At a glance

Five steps from stake to result

Book of 99 is a five-reel, three-row video slot with ten paylines that are always active. You choose only the stake—not the number of lines.

  1. 01

    Choose a stake

    The published game range is €0.10 to €100. Once a spin starts, that stake is locked for the round.

  2. 02

    Spin all ten lines

    Regular combinations are checked consecutively from the leftmost reel. Only the highest award on each line is paid; awards on different lines add.

  3. 03

    Read the Book wild

    The Book substitutes for regular symbols in the main game. It also increments the collection rail and can trigger Free Spins when three or more land.

  4. 04

    Check the collection

    Every Book in the main game adds one step. At 99, ten Free Spins are awarded through the separate collection route.

  5. 05

    Read the win display

    The game resolves valid line combinations and updates the displayed balance. A malfunction voids affected play and awards.

The visible layout

Know where to look on every spin

The collection rail sits left of the reels. The bottom controls show stake, spin, win and balance. A 3+ Book landing starts Free Spins immediately, while every base-game Book also moves the separate counter toward 99.

VerifiedThis screenshot shows the official Book of 99 game screen from its in-game help.

Book of 99 layout with reels, collection rail and controls

One symbol, three jobs

Read the Book differently by context.

Substitute

In the base game, the Book can replace any regular symbol when that creates the best valid line award.

Trigger

Three or more Books anywhere on one spin award ten Free Spins; they do not need to sit on a payline.

Collector

Every base-game Book also advances the separate meter by one, whether or not the spin itself wins.

Ten fixed paylines

Every line is active on every paid spin.

The diagrams are a quick visual index, not a replacement for the highlighted paths in the live game.

1─────
2╲───╱
3╱───╲
4──╲╱─
5──╱╲─
6╲─╱─╲
7╱─╲─╱
8─╲──╲
9─╱──╱
10╲───╲

If two triggers happen on the same spin

If three or more Books land while the collection also reaches 99, the feature created by the landed Books plays first. The collection-awarded feature follows.

Continue to the Free Spins guide →

Before real-money play

Four checks worth making in the live game

  • Confirm the displayed RTP is 99.00%.
  • Check the stake before each spin and after any feature.
  • Open the paytable to verify symbol awards and line highlights.
  • Set a cash and time limit before the collection meter influences the decision to stop.