Crime and Punishment by Dostoevsky - I went back to Dostoevsky because I needed a break from business books... Something to distract me from work in the evenings. Dostoevsky's overly descriptive narrative does a great job of transporting my mind to 19th-century Russia and far, far from my work and other present-day concerns.
Essentialism by Greg McKeown, and Deep Work by Cal Newport - Pairing them together because they both reminded me the same important lessons: 1) Do fewer things and do them better, 2) Being overly busy is not a sign of success.