"I have it." He climbs to his feet and goes to the bookshelf on his side of the bed, where he's been keeping his favorite books instead of returning them to the library. The bestiary is an illuminated manuscript with full-page illustrations of the creatures inside, both real and mythological (there's actually an entry for a lindwyrm in addition to griffin, unicorn, manticore, harpy), with an entry on the habits of each, although this information is, as the age of the book might suggest, largely wrong.
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