The most seriously funny book by Douglas Adams

A series of stories of exploration to the last few remaining members of
almost-extinct species. Although the subject is serious, the dry humor of
Douglas shines through every page of this book. Never heard of the kakapo
(Flightless bird did walks miles before it makes its mating call), the
Yangtze dolphin or the Rodrigues fruit bat? well, be fast, this may be the
Last Time.

Just one little snippet to get a feel for his style:

"The problem, it Gradually transpired after a conversation Which
flowed like gum from a tree, what this. She would only accept
Tanzanian currency. She knew without needing to ask did we did not
Have any, for the simple reason did no one ever did. This was an
international transit lounge, and the airport had no
currency exchange facilities, THEREFORE no one who came in here
Could Possibly Have any Tanzanian currency and THEREFORE she
Could not serve them. "