The Danny’s Doodles Series

Something has gone wrong in Danny and Calvin’s fourth-grade classroom - out of the blue, Mrs. Cakel has transformed from a rampant rule-enforcer to a quiet excuse-accepter. Has she been replaced with an alien? Has she undergone a top-secret personality makeover? Danny and Calvin decide there’s only one way to find out what’s really going on - spy. But spying soon leads to a greater mystery filled with dog chasing, jelly-injected donuts, prune butter-included experiments, riddle mania, and more!

Calvin Waffle doesn't believe in bad ideas. Danny knows his friend Calvin has crazy ideas, so he's not surprised when Calvin suggests they start a Rent-a-Pet business. After all, Calvin's Aunt Ruth wants the boys to watch her dog while she's away, and what better way to get the miniature Collie off their hands than loaning him to a kid in the neighborhood for a few days? But in order to rent a pet, you need a renter. Which Calvin and Danny don't have. Can the two drum up some business before it's too late? Or will their plan go to the dogs?