I'm running Graveclaw, just got through the encounter with Drusilla last night. And something I should definitely have noticed ahead of time, but only realized at the table, is that the Hunter's Hagbook is useless for my party. Our casters consist of a Bard, an Oracle, and a Summoner, all of whom are spontaneous casters, and the Hagbook, as a Grimoire, only functions for prepared casters.
Has anyone else run into this issue? Any advice on how to surreptitiously alter the book's function to be usable by such a party?
Could it be a spell extender?