Disciple - Dreamwalkers, #2

Conquer your inner demons...before they break free. Dreamwalkers protect the unknowing populace from what their powerful imaginations create: monsters. When student dreamwalker Maggie Mackey was discovered by Zeke Garrett, they formed a rare bond that makes it hard to keep their hands off each other, even though they must. Three months later, Maggie's training has stalled. Irregularities in the dreamspace combine with Zeke's crankiness to produce an atmosphere that isn't conducive to learning.
Or to friendship-of any sort. Zeke isn't sure if his clumsy mentoring, their unspoken attraction, or something more sinister is to blame. When Zeke and Maggie are summoned to a dreamwalker hospital to investigate the deaths of several patients, a nightmare from Zeke's past resurfaces to complicate matters further. To survive the secretive machinations of their own organization and a deadly new force emerging inside the dreamspace, Maggie and Zeke must confront their inner demons as well as their feelings for each other. Because in the world of dreamwalkers, inner demons don't remain politely inside one's brain.
They prefer to manifest.and eat people. Warning: Book contains sex, cursing, more cursing, T-Rexes, dire peril, and explosives.