Wedding Crasher is the 28th book in the series.
Geronimo gets an invitation to visit a long-lost relative who lives far, far away.
Oh, how I hate traveling! So when I got an invitation to visit a long-lost relative who lives far, far away, I wasn't squeaking with joy. But Thea, Trap, and Benjamin thought it sounded fabumouse. They dragged me along to the crazy castle on Penny-Pincher Peak. Rat-munching rattlesnakes! I never should have agreed to go with them...