NoLimit City game developer decided to make an online slot Book of Shadows, the first game in the book slot series. It allows getting 30.338 times the bet, which can be a massive win, but it also has some unusual features. It has five reels, three rows and ten paylines, but there is a Shadow Row feature where you can alter this – five reels, four raws and 15 paylines or five reels, five rows and 20 paylines. This feature can increase the stake by the spin, so a player must keep it in mind. The minimum stake per spin is 10 cents, and the maximum is 100 euros. To win, two to five identical symbols must land. The book is the highest paying symbol, while playing cards are the lowest in this field. Bonus features include Lucky Locks, after each spin, a player can lock up to four reels and spin others that are not locked in the hope to land identical symbols. There is also the gambling feature which is standard and means 'all or nothing' – a player must choose a red or a black card and if he/she makes the right decision, the win will double, if not, everything will be lost. It is possible to gamble five times in a row and the highest win is 500.000 euros. There is also the Wheel of Bonus feature, which makes this online slot stand out from others – it is also a gambling feature and includes free spins. The chances for the winnings increase with the size of the bet and it can't go above 60 times the stake. You'll see a satanic wheel of fortune and red segment that spins, and here, you can get up to ten free spins.