The Tiny Vampire from Outer Space That’s Bitey Xiv: Vampire Vacation: Shadow Conn Tiny Vampire, Book 14 (Unabridged‪)‬

Marcus and Shadow finally take their vampire vacation, but it isn't to a luxury vampire resort. They haven't purchased that yet, but Marcus' sire is working on it. Instead, they travel back to the Jungle of the Vampire and the Pyramid City where they first met the Jungle Food. 

There are only a few things standing in their way, like a sudden tropical storm, some dehydrated vampires, Area 51, and the Space Agency.