On any accounts don't buy this book or give it as a gift to anyone! You will certainly not climb the ladder of the recipients' esteem in any case. It is not even remotely funny. Or witty. Or priceless.
Some stuff found in the Private Eye Diary section is far far more enjoyable.
The only 2 pages containing the Kafka pastiche spoof with the man's hand turning into a mouse made me contemplate a faint smile.