Chupacabra by Roland Smith
"Chupacabra" by Roland Smith is the third book in the series that began with "Cryptid Hunters" and continued with "Tentacles." All three deal with animals either thought to be long extinct or animals of myth -- like the Loch Ness monster or Yeti. His books are always full of action and adventure. They are aimed at readers aged 8 through 12, and for those readers, the books will be difficult to put down.
Source: http://www.examiner.com/review/chupacabra-by-roland-smith-the-third-book-the-cryptid-hunters-series