Did I forget to mention that part too? That was a surprise. Also, Tobias telling Jake that excluding Cassie from a meeting afterwards was beyond wrong. I'm like, excluding her is about the least he could have done. Was the betrayal just lost on everyone in the team except Jake and Ax?
When I read Ellemist Chronicles, and it mentioned someone dying, I thought it would be someone on thier death bed. Dying of old age. Even when it was written "It started with six (even though it technically didn't), and it will end with five." I didn't want to believe anyone would die and stay dead.
Cassie's betrayal definitely confirmed that the girl put emotions above common sense. Which is often considered better in series, though it actually isn't. I read something online that there's a term for it. Du aux something, or whatever.