This book was a joy to read, and I think it's the kind of book that begs to be reread. By the title the reader knows the subject of the book: Cain slew his brother Abel, and was cursed by the lord to wander the land until he died a natural death. Cain rides his little donkey through various "future presents," witnessing events such as the fall of Jericho, and the building of the tower of Babel. Cain is there to grab Abraham's arm before he can go through with his crazy act of faith, and slay his own son. Saramago uses Cain as his biblical critic, arguing with God about who should and should not be slaughtered when He decides to obliterate the cities of Sodom and Gomorrah.
I would recommend this book to heretics with some biblical knowledge, such as Sunday School in your younger years. Open-minded believers with a sense of humor should also find pleasure reading this little gem. Saramago has given us a fine last novel full of humor and insight that I will be happy to add to my bookshelves.