Play Book of Slingo Game

At some point, the inevitable had to happen. Someone looked at the infamous "Book of" format, blinked, and thought: “What if it was bingo?” Enter Book of Slingo, a game where tomb-raiding tropes and 5x5 number grids merge under a dusty Egyptian light. Slingo Originals delivers their usual combination of reels and rows, only this time with a handful of expanding symbols, buried books, and escalating bonus rounds. You’re not exactly unearthing lost treasure, but the mashup is at least structurally sound. If nothing else, it proves that the Book mechanic has officially crossed into online slots bingo-adjacent territory. 

Book of Slingo swaps out the usual spinning reels for a 5x5 grid, placing it neatly in bingo territory. The ancient Egyptian aesthetic is, as expected, present and accounted for: stone blocks, golden artefacts, and an ominous book glowing faintly at the top of the screen. There's no charismatic explorer leading the charge, just you and your grid, with a generic temple backdrop and a soft synth echo. 

The symbols in Book of Slingo come into play only if you trigger Free Spins and reveal the expanding symbol. Here’s the basic payout structure: 

Special Symbols 

• Book Symbol: Acts as both Wild and Scatter. Substitutes during Free Spins and triggers Free Spins when 3+ land.  
• Expanding Symbol: Selected before Free Spins begin and expands to fill reels during the bonus round. 

Slingo Progression 

You start with 11 spins to land numbers on the 5x5 grid that match the numbers spun on the reel below. Completing rows, columns, or diagonals earns Slingos. Each Slingo advances you up the prize ladder to increase your potential Free Spins reward.  

Free Spins 

Triggering 5 or more Slingos awards Free Spins with an expanding symbol. Before spins begin, one random symbol is selected. This chosen symbol expands to fill its reel when it appears, paying on any line regardless of position. The number of spins depends on how far up the ladder you climbed: 5 Slingos grant 8 spins, and 10 Slingos max out at 16 spins. 

Book of Slingo is built around a 5x5 bingo grid with a single reel at the bottom used to generate up to 5 numbers per spin. You begin with 11 spins, and if you complete rows or diagonals, you climb the Slingo ladder toward Free Spins. There are no paylines in the traditional sense; the grid mechanics replace them entirely. Symbol payouts are only relevant during the bonus round, where a 5-reel, 3-row format temporarily takes over. 

If Book of Slingo sounds like your kind of temple run, here are three other BetVictor games to consider: 

• Slingo XXXtreme: A souped-up version of this one game, featuring faster play and a slightly more intense pace for those who already know the routine. 
• Slingo Da Vinci Diamonds: Another title that combines gemstone symbols and tumbling wins with the Slingo mechanic in a more artsy packaging. 
• Slingo Starburst: Take the iconic NetEnt slot, convert it into a 5x5 grid format, add a bit of Slingo progression and you’ve got Slingo Starburst. 

Book of Slingo feels like what happens when someone at the design table says, “What if we smashed two proven formulas together and called it innovation?” It’s not a bad game, but you can practically hear the creative gears grinding. That said, the expanding symbol mechanic during Free Spins keeps it interesting, and the fact that the whole thing is structured around climbing a prize ladder gives it a reason to exist beyond its name.