The Shakespeare Folio (AMNW)

Linus the chauffer buys a book to sit on, since the springs in the seat of his ancient cab have given out. Suddenly he and his passenger, Archie, find themselves the target of a hit-and-run. Upon escaping and arriving at Nero Wolfe's place, they discover the book has a fake cover and hides a Shakespeare First Folio.

Corny and thick-headed in places, but full of action and a fun listen.

Amazing Nero Wolfe #? (concluding episode to series)
The Shakespeare Folio
15 Dec 1946
19461215(000)_AMNW_TheShakespeareFolio.mp3
Sponsored by Jergen's Lotion, Francis X. Bushman, Elliott Lewis, Rex Stout (creator)

A for-real Shakespeare First Folio. 

You'll have to imagine the Spinoza cover.