Some of these are good, but it takes a bit to get moving. The first couple chapters are just jokes with "I'm not here right now" tacked on the front. Later ones are actually more answering-machine-specific and thus more amusing. Overall, amusing but not laugh-out-loud.
Shannon W. (WiseShan) reviewed No Hang-Ups Funny Answering Machine Messages on + 7 more book reviews
Funny Funny Funny! slightly outdated though as it was published in 1983
Marta J. (booksnob) reviewed No Hang-Ups Funny Answering Machine Messages on + 412 more book reviews
Funny, with real humor, not the old corny stuff