Klise, Kate. 1999. Regarding the fountain: A tale in letters, of liars and leaks.
I read this first in the Regarding the... series, because my book club has chosen it. I was already a fan, having read Regarding the Bathrooms: A Privy to the Past (see earlier post) a few months back. I'm still a fan, but I did prefer the later book in the series. Regarding the Fountain is a great place to start, though. This first book follows the students from Dry Creek Middle School through their fifth grade year. That being said, it's a great choice for 5th grade students, particularly reluctant readers or children who are comfortable sticking with a series. In the later books, the children grow older, the plot grows thicker, and the mystery becomes less obvious. The Regarding the... series is meant to grow along with the reader.
This book, like later ones, is full of puns, interesting facts, drawings, and of course - letters. An interesting and engaging format. I love it.