Here2Win Casino · Relax Gaming · Australia
Boomerang Pokies entry for Book of 99
Australian punters can open the session page for Book of 99 pokie apart from this catalogue.
Boomerang Pokies files Book of 99 as a Relax Gaming pokie for Australia and sends the session to Here2Win Casino. The card has no published RTP, so this preview does not invent one.
What this pokie is
Boomerang Pokies sends you out and back: read Book of 99 here, play it at Here2Win Casino, return to the same URL if you want the figures again. The name is the catalogue, not a mechanic.
The preview under the title is the short form of this card. A search snippet should match the page. A missing RTP stays missing there too.
Open Book of 99 from Boomerang Pokies and the play button stays on this domain before Here2Win Casino loads the pokie. A lot of Australian sessions now start on mobile. You choose the stake inside the game, in A$.
Castaway Cove is another Relax Gaming pokie in this catalogue.
The studio behind it
If you only needed the maker, it is Relax Gaming. Boomerang Pokies does not swap the studio for a local name. The provider page is the clean list.
Studio certification & mechanics
Relax Gaming (Relax Gaming Group (Kindred)) is an iGaming studio founded in 2010 and headquartered in Sliema, Malta & Tallinn, Estonia. Its random number generators (RNG) and math models are audited by eCOGRA, iTech Labs and certified across MGA, UKGC, AGCO (Ontario), Spelinspektionen, ONJN. Studio RTP policy: Fixed and multi-profile RTP certifications (~96.10%–96.50% primary setting).
In the Boomerang Pokies catalogue, Relax Gaming accounts for 223 pokies, playable at Here2Win Casino. Across the 25 titles with a published return, the studio averages 95.08% RTP (spanning 94.00% to 96.10%, with 0 pokies at 96.5% or above). Signature studio mechanics include Money Cart Hold & Respin, Dream Drop Jackpots, Connected Ways, Persistent Symbols.
Technical layout for Book of 99: 5×3 classic video grid paired with 10 paylines, running natively in HTML5 across desktop, iOS, and Android browsers at Here2Win Casino.
Expanding Symbols: Expanding symbol mechanics select one or more pay symbols that stretch vertically to cover the full reel when enough instances land.
At Here2Win Casino
Here2Win Casino is the casino on this card. Beside Book of 99 the provider page lists 223 other Relax Gaming pokies, all played at Here2Win Casino.
Published figures & technical specs
- Studio
- Relax Gaming (223 in this catalogue)
- Features
- Expanding Symbols
- Studio average RTP
- 95.08% (across 25 titles)
- Reel grid
- 5×3 classic video grid
- Pay structure
- 10 paylines
- RNG testing labs
- eCOGRA, iTech Labs
- Studio licences
- MGA, UKGC, AGCO (Ontario), Spelinspektionen, ONJN
- Platform
- HTML5 (Desktop, iOS & Android)
- Play at
- Here2Win Casino
- Stake
- A$
- Card updated
- 2026-10-29
Session math & RTP benchmark
Book of 99 does not carry an individual published RTP on its source sheet, so no single-title percentage is guessed. Across the 25 Relax Gaming titles that do publish a return in this catalogue, the studio average is 95.08% (ranging from 94.00% to 96.10%). For a balanced session at Here2Win Casino, a bankroll buffer of 150x–200x the A$ unit stake suits this pokie's profile.
| Session volume | Total turnover | Theoretical return | House margin | Est. winning spins |
|---|---|---|---|---|
| 100 spins (A$1/spin) | A$100 | A$95.08 | A$4.92 | ~27–33 |
| 250 spins (A$1/spin) | A$250 | A$237.70 | A$12.30 | ~68–83 |
| 500 spins (A$1/spin) | A$500 | A$475.40 | A$24.60 | ~135–165 |
Pros and cons
Pros
- The studio is named: Relax Gaming.
- Stake for Australian punters is in A$ at Here2Win Casino.
- The rest of Relax Gaming is one provider page away.
Cons
- Boomerang Pokies does not pay a win and does not take a deposit.
- No bonus figure is printed. Any offer sits inside Here2Win Casino and can change.
- The return gap is left empty on purpose.
- The page will not borrow a pace label from another Relax Gaming pokie.
How this pokie compares
| Title | Studio | Published RTP | RTP delta | Volatility | Grid |
|---|---|---|---|---|---|
| Book of 99 (this card) | Relax Gaming | — | — | — | 5×3 classic video grid |
| Winter Champions · Highest RTP in Relax Gaming | Relax Gaming | 96.10% | — | medium | 5×3 / 5×4 HTML5 video grid |
| Immortal 5 · Higher-volatility studio alternative | Relax Gaming | 96.10% | — | high | 5×3 / 5×4 HTML5 video grid |
| Book of Bonanza · Same mechanic (Expanding Symbols) | SmartSoft | 97.60% | — | medium-to-high | 5×3 classic video grid |
Explore head-to-head comparisons → · Session bankroll calculator →
More from Relax Gaming
Who it suits
This card does not carry a volatility mark, so Boomerang Pokies does not guess who Book of 99 suits. The studio is Relax Gaming. The session still opens at Here2Win Casino.
How a session behaves
The return trip is just another session. Keep the A$ stake where you left the rule.
A fair session on Book of 99 is a run of spins you can afford to lose, not a plan to clear a welcome offer. Boomerang Pokies does not print a bonus figure it does not hold.
Questions
Can I play Book of 99 at Here2Win Casino from Australia?
Yes. Boomerang Pokies links Book of 99 to Here2Win Casino for Australian players. The button on this page stays on boomerangpokies.com and then opens the pokie at Here2Win Casino.
What provider is behind Book of 99?
Relax Gaming is the studio named on the Book of 99 card. Boomerang Pokies groups the rest of that studio on the provider page.
Is this page the casino, or a catalogue?
Boomerang Pokies is a catalogue. The stake in A$ is placed at Here2Win Casino after you follow the play button. This page does not hold a balance.
Can I open Book of 99 on a phone?
Punters in Brisbane mostly open Book of 99 from a phone. Boomerang Pokies does not ship a separate app. The button hands the pokie to Here2Win Casino.
Is Book of 99 staked in A$?
At Here2Win Casino the stake for Australian players is in A$. Boomerang Pokies does not convert it and does not print a minimum, because the minimum is set inside the game.
Can I try Book of 99 here without an account?
This page is the written card. It does not run the reels, free or paid. Play happens at Here2Win Casino.
Does Boomerang Pokies score Book of 99?
No score is printed on purpose. A star would be a house opinion. The page sticks to the studio, the published RTP when the card has one, and the volatility label.
Can Book of 99 be due for a win?
Nothing on this page is a timer for a feature. If the last session went badly, the next one does not owe you the difference.
Is Book of 99 an 18+ game?
18+. Boomerang Pokies is a catalogue, and Here2Win Casino is where the session runs. Do not open the pokie if you are under 18.
What does the play button actually do?
Boomerang Pokies records the page you were on and sends you to Here2Win Casino with Australia already on the trail.
Where are the other Relax Gaming games?
Boomerang Pokies lists 223 pokies from Relax Gaming for Australia. Book of 99 is one of them. The provider page holds the rest.
Is Book of 99 different in another Australian city?
No. Brisbane is named because readers are there. It is not a setting inside Book of 99, and it does not change the RTP.
Does this page list a welcome offer?
No figure is invented here. If Here2Win Casino shows a welcome offer, it shows it inside the account, with its own terms. Read them there before you opt in.
Is this the same machine I would find in a club?
No. Book of 99 on Boomerang Pokies is an online pokie opened at Here2Win Casino. It is not a machine on a club floor and it does not carry a local sticker.
How do I stop a session on Book of 99?
A normal stop is the one you decided in advance. Do not wait for the pokie to look due.
Why is there no RTP for Book of 99?
No estimate is offered. An invented RTP would make the catalogue worse. The studio is still Relax Gaming, and play is still at Here2Win Casino.
Why does Book of 99 have a pros and cons list?
It splits what the card publishes from what Boomerang Pokies refuses to invent. A printed RTP is listed because it is a source figure. A missing hit rate is named as a limit, not filled in.
Which part of the Book of 99 page is the preview?
Start with the short answer under the title, then the fact list. Both should agree: studio Relax Gaming, and RTP only when the card has one. The pros and cons repeat that split in plain lines.
How do I open the right Book of 99?
This page is only Book of 99. The play button follows that name, not a shorter guess.
How many reels and paylines does Book of 99 have?
A count of free spins and a bonus-buy price are also absent. Those numbers stay off the page.
Which feature labels are on Book of 99?
The labels are Expanding Symbols. They are names only. This page does not add a bonus amount, a free-spin count, or a jackpot figure.
Stake and the cashier
Leaving for Here2Win Casino is the payment step. Boomerang Pokies does not hold a POLi or PayID balance in between.
The A$ stake is chosen inside Book of 99 at Here2Win Casino. Funding the account is a separate step from reading Boomerang Pokies.
How you open it
- Open Book of 99 from the play button. The click stays on boomerangpokies.com, then Here2Win Casino loads the pokie.
- Set the stake in A$ before the reels move. A smaller stake just makes a pokie last longer.
- Stop on a clock you set in Brisbane, not when the pokie 'looks due'.
Filed under
Features Expanding Symbols
Playing this pokie
Open the full name Book of 99 in the Here2Win Casino lobby. This page is only the Book of 99 card.
The card does not publish a maximum win, a reel count, a payline count, a count of free spins, or a bonus-buy price. Boomerang Pokies leaves those fields empty.
Australian punters play this pokie in the browser at Here2Win Casino, stake in A$. No app is installed from Boomerang Pokies.
Feature labels on this card: Expanding Symbols. A label is a name, not a price and not a description of the round.