Publisher's Synopsis
The Hollow Earth. Dinosaurs. Lizard people.
Still easier than high school.
After being abandoned by her former mentor, Holly finds herself questioning all her life choices. Before she can fully process everything, she and Adam are thrust into a new mission, deep within the Hollow Earth. With dinosaurs and Dragonkin lurking behind every corner, Holly's skills as a Blackcoat are constantly tested. But while she has their back, can she trust C.H.E.S.S. her have hers?
When things start to spiral out of control-with the fate of the surface world in the balance-Holly has to pull herself together if she hopes to survive.
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Dive into the fourth action-packed installment of the Blackcoats series!
