When your child loves maths but doesn't enjoy reading it is great to be recommended a book which is right up their street. These Math Quest books are a perfect combination for him so I ordered one from Amazon (affiliate link):

He was hooked pretty much instantly! I didn't hear a peep out of him for ages as he worked his way through the adventure. You have to solve maths problems to progress through and stop the thieves. If you get an answer wrong the book tells you what you should have done:
The math puzzles are set at KS2 level so year 3 and upwards. Younger children may need to work on the puzzles with the adults unless they are math whizzes! Don't panic parents about not knowing what all the maths terms mean as there is a helpful glossary and explanation in the back: