Could you recommend a book?

Summer is here and my son is on his way to a couple of sleepover camps for the first time.  I was never a camper myself, so I find I have very little information to offer on the typical goings on at camp.  As usual, I thought I should get him a book to read about it, but realized that I cannot think of a single book about going away to camp.  We did watch both of the parent trap movies, but that has exhausted my options.

If you would please leave some camp related book  titles in the comments, so we can try them out, it would be appreciated.  I hope you are all having a wonderful holiday weekend. Thanks for the help!