Or with characters dealing with ptsd...

In light of the movie thread, I though I should start this one;

There's a series of books by Clare Bell.
1. Ratha's Creature
2. Clan Ground
3. Ratha and Thistle-Chaser
4. Ratha's Challenge
5. Ratha's Courage

It's about these prehistoric cheetahs with human intelligence. There's a character in them called Thistle-Chaser/Newt. I believe she's only in the first, third, forth, and fifth, books. "Ratha and Thistle-Chaser" is actually dedicated to people with PTSD. It clearly states; "For the Dreambiters and Dreambitten, may they find healing.."

Newt describes her flashbacks and nightmares as "the Dreambiter".