Four Shrinking Man stories in one book!

A Prize in Every Box - She buys a box of cereal. She doesn't expect there to be a tiny man inside.
A Small Mistake - He thought woman in the personal ad was looking for a short man. He was wrong, but now he's intrigued.
Tiny Spy - He is shrunken down to spy on corporations. But once the job is done, he and his wife have some alone time.
Boy Toy and his Juicy Mistress - She finally saves enough money for her own human dildo. It's a shock when she recognizes his face.