Short answer: In Book of Dead, one symbol is selected at random for the free spins. When enough land, each expands over its reel and pays on every line.
Slots that use it
How it works
- Three Books award ten free spins.
- The Book opens and picks one symbol.
- On each free spin, ordinary wins pay first.
- If enough of the chosen symbol are present, they expand and pay again on all active lines.
Why the symbol matters
| Symbol chosen | How often it lands | What it pays |
|---|
| A card rank | More often | Small amounts |
|---|
| A mid symbol | Sometimes | Moderate amounts |
|---|
| Rich Wilde, the top symbol | Rarely | Up to 5,000x with five reels |
|---|
A description of how the feature behaves, not published odds.
What it means for play
The same ten free spins can return almost nothing or a very large multiple. That spread, more than anything in the base game, is what makes "book" slots high volatility.
The book family
Many slots copy the design. Book of Dead is the best known in Britain.
Where to play these slots
Ad 18+ only. We may earn commission from these links. Advertiser disclosure
Coral Casino ★ 4.3 out of 5
Bet £10 on slots, get 100 free spins
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- 48 hours to accept, then 7 days
- Worked value
- 100 spins at £0.10 (£10 in spins)
Significant terms: 18+. New players only. Offer runs 01/10/2026 to 01/02/2027. Deposit (certain types excluded) and bet £10+ on slot games to get 100 free spins (selected games, £0.10 each, 48 hrs to accept, valid 7 days). No wagering on free spin winnings. Deposits by Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards do not qualify. Restrictions and T&Cs apply. BeGambleAware.org
Ladbrokes Casino ★ 4.2 out of 5
Play £10 on slots, get up to 500 free spins
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- Claim daily for 10 days; each batch valid 7 days
- Worked value
- Up to 500 spins at £0.10 (up to £50 in spins)
Significant terms: 18+. New customers only, from 14/11/25 until further notice. Certain deposit methods excluded. Deposit and spend £10+ on slots for 50 free spins a day during the first 10 days after first deposit and registration (max 500, £0.10 each, selected games, claim before 23:59 each day, valid 7 days). No wagering. Prepaid cards, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits do not qualify. Restrictions and T&Cs apply. BeGambleAware.org
PlayOJO ★ 4.2 out of 5
80 free spins, no wagering
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- See offer terms
- Worked value
- 80 spins at £0.10 (£8 in spins)
Significant terms: 18+. First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. BeGambleAware.org
Casumo ★ 4.2 out of 5
50% bonus up to £100
10x wageringMatched deposit
- Wagering
- 10x bonus
- Minimum
- £20
- Time limit
- 7 days to complete wagering
- Worked value
- Deposit £200, get £100 bonus
Significant terms: 18+. New customers only. Opt-in required. 50% deposit bonus up to £100 on first deposit. Minimum deposit £20. 10x wagering on the bonus amount. Maximum bet or spin £5. Bonus valid for 7 days. Game, play and payment method restrictions apply. Full T&Cs apply. BeGambleAware.org
10bet Casino ★ 3.8 out of 5
100% bonus up to £25
10x wageringMatched deposit
- Wagering
- 10x bonus
- Minimum
- £10 (check at sign-up)
- Time limit
- 3 days to complete wagering
- Worked value
- Deposit £25, play with £50
Significant terms: 18+. New UK customers only. Select the casino welcome bonus at sign-up and make your first deposit within 7 days. 100% bonus up to £25. Wager the bonus 10x on slots within 3 days. Maximum bonus winnings £1,000. Bonus is not redeemable. Full T&Cs apply. BeGambleAware.org
More mechanics: Multipliers in slots, Pick bonus in slots and Cash collect in slots.
Related: volatility explained, reading a paytable and the slot finder.
Slot figures are developers' published defaults, each confirmed against two sources; a casino may run a lower RTP. Offer terms dated 5 October 2026. How we check. 18+. Free help: 0808 8020 133 or safer gambling.
