If you’re a UK slot player who’s ever searched for “high RTP Book of slots” or specifically “Book of 99 RTP,” you’re likely wondering: is Book of 99 really as generous as its name suggests, and where can I play it safely online? In this post, we’ll break down the nitty-gritty of RTP (Return to Player), clear up some common misconceptions, and guide you to top UK casinos like MrQ, VideoSlots, and Casumo where this slot is available.
What Does RTP Actually Mean?
RTP stands for Return to Player, a percentage that indicates how much of the money wagered on a slot is theoretically returned to players over a very long timeframe. For example, a slot with 99% RTP like Pragmatic Play’s Book of 99 aims to pay back £99 for every £100 bet — but that doesn’t mean you’ll actually get £99 back every session.
Here’s what RTP does not mean:
- It does not guarantee big wins or a steady return during your gaming session. It isn’t a prediction or promise for your spins tonight. It is calculated over millions of spins, across all UK players combined.
What RTP does mean is that, over time, the slot is designed to return more to players than a typical slot, making it a better proposition from a mathematical standpoint. This is why many players actively seek out high RTP slots like Book of 99.
Quick Reminder: Check the Info Panel
Before you start spinning, always check the slot’s info panel. That’s where you find crucial details like RTP, volatility (risk level), paylines, and bonus features. Keep in mind some UK operators might offer slightly different RTP settings for the same game, so a quick glance there can save you surprises.
Book of 99 RTP Explained
Book of 99 by Relax Gaming is a unique entry into the popular “Book of” slot series, a genre known for their free spins and expanding symbol mechanics. The standout feature is its ridiculously high RTP of 99%, which is one of the highest in the UK slot market.
Slot Provider Typical RTP Volatility Book of 99 Relax Gaming 99% Medium Book of Dead Play’n GO 96.21% High Book of Ra Novomatic 92%-95% Medium-High
The caveat here is that while Book of 99's RTP of 99% is impressive, RTP belongs to the game, not the casino. This means no matter where you play it—whether that’s MrQ, VideoSlots, or Casumo—the theoretical RTP stays the same. However, operators sometimes tweak RTP or have exclusives, so always verify RTP vs volatility on the site you choose.
Where Can You Play Book of 99 in the UK?
Book of 99 is not as widely available as some other “Book of” series slots like NetEnt’s Book of Dead or Microgaming’s Book of Souls, but thanks to its Relax Gaming license, it’s popping up on many UK-friendly platforms.
MrQ (mrq.com)
MrQ is a UK-based, UKGC-licensed casino known for a quality curated slots collection and straightforward bonus offers. They host Book of 99 with full respect to its RTP and run regular promotions that highlight it. The site design is clean, easy to navigate, and perfect for players who like a no-frills experience.
VideoSlots
VideoSlots.com is one of the UK’s biggest virtual slot libraries — it’s packed with thousands of games from dozens of providers including Relax Gaming. VideoSlots regularly updates their game roster and offers demo spins so you can try Book of 99 risk-free. They also publish RTP info clearly, aligning with responsible gaming standards.
Casumo
Casumo is a popular UK site with a gamified interface and solid provider partnerships. Their selection is more concentrated on big-name slots but they do have Relax Gaming titles like Book Mr Vegas slots of 99. Casumo’s player-friendly policies make it easy to enjoy high RTP slots with transparency on payout rates.
Why Big UK Slot Libraries Matter
Casinos with extensive collections like VideoSlots are valuable because:
- Variety: More options mean you can compare high RTP slots and pick ones that fit your style. Exclusive versions: Some big operators negotiate exclusive RTP tweaks or bonus rounds. Demo Play: You get to test games like Book of 99 without spending real money. Reliable licensing: Large UK casinos usually have strong UK Gambling Commission licenses, ensuring fairness.
Other High-RTP Book of Slots UK Players Love
While Book of 99 is a fantastic find for RTP-focused players, the “Book” slot genre has plenty of popular entries. Here are some other titles often searched alongside “high RTP Book of slots”:
Book of Dead (Play’n GO) — RTP ~96.21%, high volatility, globally popular for its Egyptian theme. Book of Ra Deluxe (Novomatic) — RTP varies across operators, usually 92-95%, classic casino staple. Book of Souls (Microgaming) — RTP around 96.3%, known for its free spins with expanding features.It’s worth noting that some of the world’s leading slots providers like Pragmatic Play and NetEnt don’t currently offer a “Book of” series but excel in other high RTP slots, such as Pragmatic Play’s Sweet Bonanza (RTP 96.48%) or NetEnt’s Starburst (RTP 96.1%).
Final Thoughts: Is Book of 99 Worth Your Time?
Book of 99 genuinely stands out as one of the highest RTP slots you can find in the UK market, sporting an RTP of 99% by Relax Gaming. This makes it a top pick for mathematically savvy players who want to maximise theoretical returns.
But remember, RTP is a long-term measure and never guarantees what happens in one sitting. Also, always check the slot’s info panel to confirm RTP and volatility before playing real money. Whether you use MrQ, VideoSlots, or Casumo, you’re playing with a trustworthy UK licensee that respects the game’s RTP.
So, if you’re on the hunt for “UK casino Book of 99” options, these operators are a solid place to start your quest for high RTP fun.