Monsterious book 5. This fun little horror middle grade book takes us into a bosoms with a mysterious creature lurking about. Ratchet up the pressure as the air supply begins to run out and it is a race against time. But in the end who is the real monster, a little Dr Frankenstein-ish. Aside from the flippant releasing an invasive species into the ecosystem, let alone an apex level one, it was a good read. The series still remains on the line of Goosebumps.