Thanks to everyone who responded to my request for suggestions regarding my SRP Book Club for 3rd-5th graders. The popular choice was the Chet Gecko series by Bruce Hale. A close second was Chasing Vermeer by Blue Balliett. Other suggestions included:
a John Bellairs book Encyclopedia Brown Bunnicula Room One by Andrew Clements Mini Mysteries by Rick Walton Shakespeare's Secret by Elise Broach The Absolutely True Story by Willo Davis Roberts Mysteries in our National Parks by Gloria Skurzynski Stranger Next Door by Peg Kehret Fergus Crane by Paul Stewart Mummy Mysteries - Tales from North America by Brenda Z. Guiberson A-Z Mysteries Cam Jansen Hank the Cowdog Spiderwick Chronicles The Invention of Hugo Cabret The Westing Game by Ellen Raskin The Fairy-tale Detectives by Michael Buckley