The Good Soldier
By Ford Madox Ford

I buy this book in bulk so I can give a copy to anyone who might wander by. It is a gorgeous and heartbreaking novel with one of the most ambitious narrative structures I've ever seen. Two couples are best friends. Three of them are involved in an intricate series of lies. The fourth, who has been kept in the dark, is the one who tells us what happened. The novel has one of the greatest opening lines: "This is the saddest story I have ever heard."