Would someone actually send real diamonds to a dog? Now that one of the gems is missing, first kids Cammie and Tessa Parks are no longer so sure that the big, fat, diamonds on their dog Holligan’s new collar are imitations. But how can they know for sure? Why would someone representing the president of a nearby country send a dog such a valuable gift? In this second book in the First Kids Mystery series, the president’s daughters tackle a puzzling new case that casts suspicions on members of the White House staff.  This is a sequel to The Case of the Rock ‘N’ Roll Dog.

When his mother brings home a guinea pig instead of the dog he has always wanted, fifth-grader Rufus is not happy–until the rodent starts acting exactly like a dog.  Rufus is both embarrassed (what will his friends think?) and charmed by Fido’s dog-like behaviors; she obeys his commands, chews his dad’s shoes, rolls over, and plays fetch.