Truman Capote's In Cold Blood is probably the most well-known and most respected true crime book of all time.

The book follows the murders of four members of the Herbert Clutter family in 1959. When Capote heard about the murders he travelled to Holcomb, Kansas with his friend Harper Lee. Together they interviewed local residents and police about the crime.

Six weeks later Richard "Dick;" Hickock and Perry Smith were arrested for the murders. They were eventually executed by the state of Kansas.

Capote spent six years working on the book and spent hours interviewing the murderers from their jail cells.

In Cold Blood is the second biggest selling true crime book in publishing history.

3. Adnan's Story, Rabia Chaudry

Adnan's Story is written by Rabia Chaudry, a lawyer who also happens to be Adnan's family friend.

It was Chaudry who originally recommended the case to Sarah Koenig, who deep-dived into the murder of Hae Min Lee in the first season of Serial.

In Adnan's Story, Chaudry further examines the case - looking into Adnan's history and investigating other potential subjects.

If you still haven't filled the gap that Serial season one left in your life, then this is the book for you.