Zoned Out (Area 51 Interns, Bk. 2)

After saving their parents from an alien attack and becoming official interns at Area 51, Viv Harlow and her friends Charlotte, Ray, and Elijah are ready to keep taking down bad guys and helping test all the fun high-tech gadgets. Instead, they all get put on filing duty (bo-ring!) and kept away from the real action. When Elijah discovers a secret Forbidden Zone hidden away on the base, the group jumps at the chance to explore the new place, only to learn it's home to some of the most elusive creatures on Earth. But after the Yeti, Loch Ness Monster, and more terrifying monsters escape, they'll have to prove themselves to their parents and capture the beasts to save the base!