Impossiable for me to name one book. I have to Broad taste in lit for that. I have like 10 books that are My all time favs. I Will mention a few of them i like more than all.
Red Harvest - Dashiell Hammett
Tales of Dying Earth - Jack Vance
The book of Wonder - Lord Dunsany
Medea - Euripides
The Sorrows of Young Werther - Johann Wolfgang von Goethe