Book of Lady Slot Review
by EndorphinaReleased Mar 3, 2022
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Book of Lady is a glamorous luxury 5x3 Book slot from Endorphina across 10 lines, where 10 free games run on a random expanding symbol and a Bonus Pop lets you pick which symbol expands, climbing toward a 5,000x ceiling.

Specifications
| Game Type | Slots |
|---|---|
| RTP | 96.03% |
| Volatility | Medium |
| Max Win | 5,000x |
| Grid | 5x3 |
| Paylines | 10 paylines |
| Min Bet | $0.1 |
Book of Lady Slot Overview
Book of Lady is Endorphina's book slot dressed for a night on the catwalk. A crowned red book works as wild and scatter at the same time, three of them open ten free games, and one symbol gets picked at random to expand across its reel. Anyone who has played a Book of Ra descendant knows the shape of this one before the first spin.
The tweaks sit around the edges. Ten paylines, adjustable down to one if you want a cheaper spin. A Bonus Pop button sits beside the reels the whole time, and buying the bonus here does something the usual buy button does not: it lets you pick which symbol expands. That choice is worth more than the price.
Round it out with a card gamble on every win and three network mystery jackpots that draw at random. RTP is 96.03% and the ceiling is 5,000x.
Theme & Design
The reels stand on a blue-lit runway flanked by marble columns, stage rigs and spotlights hanging overhead, the grid itself a deep purple panel in a thin gold frame under a red-and-gold logo capped with a jewelled crown. Pure perfume advert. The luxury shorthand is laid on thick: a black stiletto with a red sole, a tan top-handle handbag with brown straps, a blonde woman in the top slot, and a white Persian cat with odd eyes, one yellow and one blue, sitting on a red tasselled cushion.
The cat is the best piece of art in the game and it is not close. Everything else is stock glamour, competently drawn. The royals get the full treatment as well, red 10s, blue Js with a gold fleur-de-lis, gold Qs and orange Ks under little crowns, an A set in purple with a blue gem, and all that gilding makes a grid of low symbols read as busier than it actually is. The music is light lounge with a runway sting on wins, and it stays out of the way.
Symbols & Paytable
| Symbol | Payout |
|---|---|
| Book of Lady | Wild and scatter in one symbolSubstitutes for every regular symbol; 3 or more anywhere award 10 free games |
| The Lady | Top-paying regular symbolThe one you want drawn as the expanding symbol |
| White Persian cat | High-value premium |
| Designer handbag | High-value premium |
| Stiletto heel | High-value premium |
| Royals 10, J, Q, K, A | Low payersThey fill most of the grid, which is why the base game runs so quiet |
Features & How They Work
The book does two jobs
The Book of Lady symbol is wild and scatter at once, the trick that makes this family of slots work at all. As a wild it stands in for any regular symbol on the ten active lines. As a scatter it counts wherever it lands, no line needed, and three or more start the free games. One restriction carries into the bonus: the book will not substitute for the special expanding symbol, so a near miss on that symbol stays a near miss.
Ten free games, one expanding symbol
Three books award ten free games. Before they begin, one regular symbol is drawn and given the ability to expand. From that point only the count matters, not the position: land enough of the chosen symbol anywhere on the reels and it stretches to fill its column, then pays for combinations in adjacent and non-adjacent positions on the active lines. The expansion resolves after regular wins are paid, so one spin can pay you twice.
Retriggers stack the expanding symbols
Three more books inside the round retrigger it, and each retrigger adds another symbol to the expanding pool, to a maximum of nine. Reaching nine would mean chaining retriggers almost every spin, so treat that number as theoretical. Two or three expanding symbols is the realistic good outcome, and it changes the round entirely, because the expansions overlap and a single spin can fill several columns.
Bonus Pop and the symbol you choose
Bonus Pop buys the ten free games outright, priced against total bet: at the 0.10 default it costs 6.90, so about 69x. The purchase also lets you name the first expanding symbol instead of leaving it to the draw, and that is the part actually worth paying for, since taking the Lady over a 10 rewrites the maths of the whole round. The bought round opens with a base spin that lands three scatters, so it plays out like a natural trigger. Bonus Pop winnings cannot be sent to the gamble, and some operators switch the button off.
Risk Game and the mystery jackpots
Any win can go to the card gamble: pick one of four face-down cards and beat the dealer to double, up to ten times running. The dealer never draws a joker and yours beats everything, which sounds generous until you see the round averages 84% back, far under the slot itself. A fun button, not a strategy. Sitting above all of it are three network mystery jackpots, Grand, Major and Minor, drawn at random with no player input beyond betting more for better odds. The gamble is locked out during autoplay, and the jackpots can be disabled entirely by the operator.
Screenshots

How Book of Lady Plays
The base game is thin, which is normal for the format but worth saying out loud. Ten lines on a 5x3 grid gives few ways to catch anything, and with five royals crowding the reels most spins hand back nothing or a couple of coins. The premiums pay properly. They just do not turn up in threes often.
What you are really watching for is books. One lands and nothing happens; two and the third reel spinning down carries an edge. That tension is the whole draw, and it fires rarely enough to keep meaning something.
Then the bonus arrives and the round is decided in the first two seconds, when the symbol gets drawn. Pull a royal and ten spins pass politely. Pull the Lady or the cat and the same ten spins can run away from you. It is a small brutal lottery sitting inside a bigger one, probably more interesting than a bonus that pays out evenly, though it does mean plenty of rounds end flat. Medium volatility on the label, but the swing inside the bonus feels sharper than that.
Pros & Cons
Pros
- Bonus Pop lets you choose the expanding symbol, not just buy the round
- Retriggers add extra expanding symbols rather than only extra spins
- Paylines adjust from 1 to 10, so a small balance stretches further
- Runway art and symbol work are a step above the usual book-slot dressing
Cons
- Royal-heavy base game with long dead stretches between books
- Ten free spins is a short window, and a low-value expanding symbol wastes the round
- The 84% gamble is a worse bet than the slot you are already playing
- Mechanically it does nothing a dozen other book slots have not done
Is Book of Lady Worth Playing?
A well-dressed copy of a formula that was old before this launched, and Endorphina clearly knows it. The runway art is sharp and the cat deserves its own game. The one decision that matters, letting Bonus Pop buyers name the expanding symbol, does more for the game than any amount of polish, and the 5,000x top end is an honest number for the type rather than a headline.
The weakness is what it always is with ten-line book slots: the base game exists to be survived. Ten free spins is a short window to justify a long wait, and the random draw at the start of it means a lot of bonuses finish with a shrug. Endorphina built a pretty version of a familiar machine and priced the shortcut at 69x.
Frequently Asked Questions
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Reviewed by Arina, PR & Content Manager
PR & Content Manager at SlotsReach
Published 31 Jul 2026 · Updated 31 Jul 2026