Spellbound

Spell Bound is the Empire Strikes Back of the Otherworld series — Savannah loses her magic and has to survive on guts alone while assassins, necromancers, and rogue supernaturals close in. Her romance with Adam finally clicks into place, genuinely sweet because she's at her most stripped-down and he loves her anyway. The pacing is relentless as an Otherworld war brews in the background. Read immediately after Waking the Witch — these two are basically one story split in half.