Can everyones favourite insurance mathematician, Henri, combine the increasingly dangerous world of adventure parks with the unpredictability of blended-family life? Hes about to find out in the final instalment of the hilarious, nail-biting Rabbit Factor Trilogy.

Henri Koskinen, intrepid insurance mathematician and adventure-park entrepreneur, firmly believes in the power of common sense and order. That is until he moves in with painter Laura Helanto and her daughter

As Henri realises he has inadvertently become part of a group of local dads, a competing adventure park is seeking to expand their operations, not always sticking to the law in the process

Is it possible to combine the increasingly dangerous world of the adventure-park business with the unpredictability of life in a blended family? At first glance, the two appear to have only one thing in common: neither deals particularly well with a mounting body count.

In order to solve this seemingly impossible conundrum, Henri is forced to step far beyond the mathematical precision of his comfort zone and the stakes have never been higher

Warmly funny, quirky, touching, and a nail-biting triumph of a thriller, The Beaver Theory is the final instalment in the award-winning Rabbit Factor Trilogy, as Henri encounters the biggest challenge of his career, with hair-raising results