Small Gods, by Terry Pratchett
And, in these days, it became that the great god Om came to the earth to bring the word to the chosen one, and the word was "Ey, you! Are you deaf, boy?"
A god finds that his divine plans had fallen at some moment, and he has to fix all with the help of the last of his believers. The characters are memorable, the situations hilarious, and there's a great wisdom in the story. How a god wined the right to be worshipped.
I am a big fan of this writer. I couldn't wait for the translation and I read it in English some years ago.
Eugenia, from the Luarca B2+