On occasion, a small mimic poses as a spellbook so persuasively that it actually is a spellbook item, and you can pick it up and carry it around. Attempting to identify, read, throw or kick the book reveals it as a mimic. (If mimics have been genocided, this silently doesn’t happen.)

Internally this is stored using the book’s otrapped flag.

Small mimics (but not large or giant ones) can mimic the floor, looking like nothing in the same way a trapper or lurker above does.