Play Book of Fusion Slot

There's something oddly fitting about taking the age-old "Book of" formula and throwing it into a futuristic lab. Book of Fusion, developed by Light & Wonder (formerly SG Digital), ditches the usual tomb-raiding and Egyptian temples in favour of beakers, glowing machinery, and a scientist who looks like he's moments away from making history — or blowing something up. It's a fresh twist on a well-worn concept. 

The game runs on a familiar 5-reel, 3-row setup with 10 paylines, keeping things straightforward. Winning combinations form when symbols land from left to right across a payline. The minimum bet starts at 0.10, making it accessible for most budgets. While the book symbol plays its usual dual role as both a wild and a scatter, the real intrigue kicks in during the Free Spins round, where not one but two expanding symbols come into play. 

Light & Wonder isn’t new to taking classic mechanics and tweaking them just enough to make things interesting. They’ve produced a range of well-received slots in the past, including titles like Raging Rhino and Monopoly Megaways. Book of Fusion follows the same philosophy — take a proven formula, shake it up a bit, and let players experiment with the results. 

Here’s how you can get started and play Book of Fusion for yourself: 

1. Sign in to your account at Heart Bingo. 
2. Head to the online slots page. 
3. Search for “Book of Fusion” and click the game when it appears. 
4. Once it's loaded, click on the pile of coins to find an appropriate stake size. 
5. Click the Spin button to get the reels moving. 

If you aren't already registered, click on the green 'Sign Up' button in the top right corner and fill in the required fields. You can then verify your account and make a deposit if you want to play Book of Fusion with real funds.  

The symbols in Book of Fusion stick to the theme, featuring a mix of futuristic-looking gadgets and classic slot elements. Lower-paying symbols include 10 to A card royals, while higher-paying ones introduce scientific instruments and the game’s eccentric scientist. A breakdown of all the symbols and their respective payouts is given below: 

The Book of Fusion symbol acts as a wild, meaning it can substitute for any paying symbol to help create winning combinations. It also doubles as a scatter — landing three, four, or five book symbols awards 2x, 20x, or 200x the bet, along with 10 free spins. 

Free Spins with Dual Expanding Symbols 

Before the free spins begin, the game randomly selects two symbols — one low-paying and one high-paying — to become special expanding symbols. Whenever these symbols land, they expand to fill their reels if a winning combination is possible. Unlike regular paylines, expanded symbols pay from any position, meaning they don’t have to be adjacent or start from the leftmost reel. 

The Free Spins round can be retriggered if three or more book symbols land again during the feature. Every retrigger adds 10 more free spins and assigns two additional expanding symbols. This can continue until all ten symbols become expanders, at which point retriggers stop.

Book of Fusion takes the "Book of" slot formula in a fresh direction, much like Book of Toro or Book of Inti, which also introduce twists to the standard expanding symbol mechanic. Fans of science-themed slots might also enjoy Dr.Toonz or Reactoonz, both of which play around with futuristic lab aesthetics. All these titles are available at Heart Bingo.