Danny's doodles

"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 on vacation, 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"--Back cover.

When Mrs. Cakel transforms from a rampant rule-enforcer to a quiet excuse-accepter, Danny and Calvin begin a secret investigation and encounter a variety of mysteries along the way.

The ever-quirky Calvin convinces Danny to help him start a rent-a-pet business when Calvin's Aunt Ruth asks the boys to watch her miniature collie while she is away, but first they will have to find a renter.

When Mrs. Cakel transforms from a rampant rule-enforcer to a quiet excuse-accepter, Danny and Calvin begin a secret investigation and encounter a variety of mysteries along the way.

Danny is not sure what to make of Calvin Waffle, a quirky and smart new fourth grader, but when Danny convinces Calvin to use his brain power to help the baseball team, they both have a chance to become heroes.

Danny is not sure what to make of Calvin Waffle, a quirky and smart new fourth grader, but when Danny convinces Calvin to use his brain power to help the baseball team, they both have a chance to become heroes.