Book of Kingdoms is a 5-reel, 10-payline video slot developed by Pragmatic Play. It carries a published RTP of 96.06%, an expanding symbol mechanic during free spins, and a fantasy-kingdom theme that sits firmly in the "book slot" subgenre popularised by Book of Ra. You can play it at most Pragmatic Play-licensed casinos across the US (where permitted), UK, Canada, Australia, New Zealand, and Germany.

What Kind of Slot Is Book of Kingdoms?

Book of Kingdoms follows the template of high-volatility book slots. The Book symbol acts as both the scatter and the wild. Land three or more Books anywhere on the reels to trigger the free spins round. During that round, one symbol is chosen at random to expand and cover an entire reel, paying in any position. That single mechanic drives most of the big wins in this game, so session results can swing hard in either direction.

  • Reels and rows: 5x3 grid
  • Paylines: 10 fixed
  • RTP: 96.06% (confirm the version loaded at your casino, as some operators use lower-RTP variants)
  • Volatility: High
  • Theme: Fantasy kingdoms, maps, warriors, and magical artefacts
  • Developer: Pragmatic Play

How the Free Spins and Expanding Symbol Work

The free spins feature is the core of Book of Kingdoms. Here is exactly how it runs:

  • Trigger: 3, 4, or 5 Book scatter symbols anywhere on the reels
  • Award: 10 free spins
  • Before the first free spin, the game randomly selects one symbol to become the expanding special symbol
  • During free spins, if the expanding symbol lands anywhere on a reel it stretches to fill the full reel and pays across all active paylines regardless of position
  • Retriggers: landing 3 or more Books during the free spins round awards 10 additional spins
  • The expanding symbol stays fixed for the entire feature, including any retriggered spins

The highest-paying symbols are the knight and the queen. If either of those is selected as the expanding symbol you have the conditions for the slot's top end pays. If a low-value card symbol is chosen, the feature tends to produce modest returns. That randomness is what gives the game its high variance character.

RTP and Volatility: What They Mean for Your Bankroll

An RTP of 96.06% means that over a very large number of spins, the game returns roughly 96 cents for every dollar wagered on average. It does not mean you will receive 96 cents back in any single session. High volatility means wins arrive infrequently but tend to be larger when they do land. Budget accordingly. Short sessions on high-volatility slots carry a real risk of losing your stake before the bonus triggers.

One important check: Pragmatic Play supplies different RTP configurations to operators. The default is 96.06%, but some casinos use a lower version. Look for an information or paytable button inside the game itself to verify the RTP loaded at the specific casino you are using. If it is materially below 96%, consider switching to a different site.

Where Can You Play Book of Kingdoms?

Book of Kingdoms is available at any online casino that holds a Pragmatic Play content licence and operates in your jurisdiction. For real-money play in regulated markets, check that the casino holds a licence relevant to your country, such as the Malta Gaming Authority (MGA), the UK Gambling Commission (UKGC), or a Curaçao licence for markets not covered by stricter regulators. Our guide to the best online casino sites in 2026 lists top-rated options we have tested ourselves, which is a reliable starting point if you are not sure where to sign up.

If you want to try the game before depositing, some casinos offer a demo mode. You can also check our free slots section for no-download, no-deposit play options across a wide range of titles.

For real-money play, a few casinos in our verified list carry Pragmatic Play content and have welcome offers worth considering:

  • Slotoro Casino: Up to €2,500 + 250 Free Spins over 3 Deposits
  • Spinit Casino: 100% Match + 200 Free Spins
  • Whamoo Casino: 100% Match + 300 Extra Spins on Book of Dead
  • VegaZone Casino: Welcome Package up to €2,600 + 260 Spins
  • NovaJackpot Casino: Welcome Package up to €2,500 + 250 Spins

Always read the bonus terms before depositing. Wagering requirements, eligible games, and time limits vary by casino and can affect whether Book of Kingdoms counts toward clearing a bonus.

Does Book of Kingdoms Count Toward Casino Bonuses?

High-volatility slots sometimes carry a reduced contribution rate toward wagering requirements at certain casinos. For example, a casino might specify that slots contribute 100% but that specific games are excluded or contribute only 10% or 20%. Check the bonus terms at whichever casino you choose. Look for a terms page, a game exclusions list, or a live chat agent who can confirm the contribution rate for Book of Kingdoms specifically. If the game is excluded or restricted, you can complete the wagering on another eligible title first, then switch to Book of Kingdoms for free play.

Comparing Book of Kingdoms to Similar Book Slots

If you enjoy Book of Kingdoms, these are the closest comparable titles by mechanic:

  • Book of Dead (Play'n GO): The most widely distributed book slot. Single expanding symbol, 5x3, 10 paylines, 96.21% default RTP.
  • Book of Ra (Novomatic): The original book slot. Older engine, 5x3, 9 paylines. Less common at newer regulated sites.
  • Rise of Samurai (Pragmatic Play): Same developer as Book of Kingdoms, similar expanding symbol mechanic, samurai theme.
  • Eye of Cleopatra (Pragmatic Play): Another Pragmatic Play book-style game with expanding reels in free spins.

Book of Kingdoms distinguishes itself mainly through its art direction and the specific symbol set. The core gameplay loop is nearly identical to Book of Dead. If you have played one book slot you know the rhythm of this one.

Responsible Gambling When Playing High-Volatility Slots

High-volatility slots like Book of Kingdoms can produce long losing streaks before a big win, and equally, a large win early in a session can vanish quickly if you keep playing. A few practical limits help:

  • Set a session loss limit before you start and stop when you hit it
  • Use deposit limits available in your casino account settings
  • Do not chase losses by increasing your bet size mid-session
  • Use reality-check timers if your casino offers them
  • If gambling stops being entertainment and starts feeling compulsive, visit our responsible gaming page for tools and support contacts available in your country

Book of Kingdoms is a well-built Pragmatic Play slot with a clean expanding symbol mechanic and a fair published RTP. The best next step is to check your preferred casino for the RTP version they load, confirm the slot counts toward any active bonus at full contribution, and set your bet size relative to your session bankroll before the first spin.