Discovering treasure in a lost jungle pyramid is the aim in Book of Maya. This 5 reel, 10 payline slot from Novomatic is a simple but very volatile one that comes with a free spins round where a randomly chosen symbol expands to fill the reel whenever it hits. Activate Extra Bet mode to bring sticky re-spins into play. Play on all devices from between 10p and £20 per spin.

There’s a primitive feel to the design in Book of Maya – set against jungle temple ruins, the plain black reels include stone style A to 9 playing cards plus an assortment of Mayan statues and an Indiana Jones-style adventurer. The ‘I can’t believe it’s not Indy’ character is the top payer, awarding 500 times your stake if you land 5 on a payline.

The mysterious Book of Maya serves a dual purpose, acting as both the wild and scatter. It replaces all other symbols and also triggers the gam’s Free Games feature.

Land 3 or more of the Book of Maya on the same spin and you’ll receive 10 free spins. Before your free spins begin, 1 symbol is chosen at random. Whenever this symbol lands during the free spins round, it will expand to turn the whole of the reel into the same symbol – this increases your chances of forming big wins.

More goodies are on offer if you’ve activated Extra Bet play in the base game. This doubles your stake per spin – unfortunately, the payouts for the symbols don’t double so 5 Indy style characters will give you 250 times your stake. In return, you’ll bring respins into play during the feature.

Land the special chosen symbol and it will fill the reel as normal. It will then lock in place and a respin of the other reels follows. This gives you the chance to fill even more reels with matching symbols with payouts to match.

Like most slots in the Novomatic catalogue, you’d be hard pressed to describe Book of Maya as a well-designed slot. The imagery is crudely drawn, the colours migraine inducing and the soundtrack generic. No gold star there then.  What Book of Maya does offer is extremely volatile action which is one of the primary reasons why we keep on coming back to Novomatic’s games despite their obvious design limitations.

The variance here is sky high. If you’re looking for a slot that’s sedate and easy on the senses, then look elsewhere. For simple, volatile action you won’t go far wrong consulting the Book of Maya. If you like special expanding symbols in the feature, Novomatic has plenty of alternatives like Book of Ra Deluxe and Red Lady.