Dog detectives Lu and Clancy try to solve another case that offers aspiring detectives a chance to develop their sleuthing skills with sixteen secret codes that must be deciphered to help solve the mystery. Original.
I grabbed this book from the library to help my 9-yr-old learn about cryptography for earning a a Super Nova Award in cub scouts. Out of the attack of books on cryptography for kids, this was the best. Both my 7-yr-old and 9-yr-old loved learning about each different code and trying to decipher the messages Lu and Clancy sent to eachother.
So this was actually Lu and Clancy: The Vanishing Cat but I couldn't find that one on this site. This book is really cute. Along with the mystery included, the author also gave step by step instructions for students to do their own magic tricks. This is a good mystery book for 1st or 2nd grade.