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SlotCatalog explains: Thunderspin’s Bonus in Bonus Feature

With the launch of the Book of Jam slot in October 2021, developer Thunderspin presented its new Bonus in Bonus feature mechanic, which amplifies the experience of a standard Expanding Book-style Free Spins bonus.

Bonus description

Get a generous Welcome Offer from Captain Spins casino in total amount of 100% up to £1,200 + 260 Bonus Spins in Book of Dead slot from Play'n GO!
18+ | New players only. Max bonus bet £5. Min deposit £10. Wager: 35x. Bonus funds active within 30 days and spins within 10 days.

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Read our guides to learn more about slot games, online casinos and how to use SlotCatalog

SlotCatalog explains: Thunderspin’s Bonus in Bonus Feature

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