Around the World in Eighty Days, from Jules Verne. I read that when i was a child and blowed my mind with glimpses from other countries, other cultures and the joy of reading.

I think that after that book i had the question: how 100 years ago he was able to write about those places?. Then i never stopped to read. After that i started to develop the addiction i have about knowledge.

EDIT: oh, and the final plot twist.., was amazing.