My 7 year old DD found an old book of mine - Piccolo mysterysolvers - where each chapter is a "mystery". There are two children who investigate then there is a picture at the end and you have to solve the mystery using clues in the chapter/picture. The solutions are at the back in mirror writing.
The one I had was like this Case of the Chocolate snatcher
I bought a few more in the series and found they have reprinted them New Version
Does anyone have any ideas for other books she might like?
She has just discovered my old fighting fantasy choose your own adventure books (Warlock of Firetop Mountain etc) and loves those too.