This bumper volume contains the first 3 solv e-it-yourself mysteries. Colour photos contain all the clues readers will need to solve each mystery when they are on th e trail of the missing professor, the stolen black diamond a nd the pirate treasure. '
Absolutely loved this book growing up, although most my life it seemed too much a challenge to follow through with the entire mystery, but I blame my ADD for that. I don't know if there were ever other books to make it a series, but there should be.