Matt Haig is an English author and journalist, he was born on 3 July 1975 in Sheffield. He has written both fiction and non-fiction books for children and adults, often in the speculative fiction genre. His work of non-fiction, Reasons to Stay Alive, was a number one Sunday Times bestseller and was in the UK top 10 for 46 weeks.

His novels are often dark and quirky takes on family life. The Last Family in England retells Shakespeare's Henry IV, Part 1 with the protagonists as dogs. His second novel Dead Fathers Club is based on Hamlet, telling the story of an introspective 11-year-old dealing with the recent death of his father and the subsequent appearance of his father's ghost. His third adult novel, The Possession of Mr Cave, deals with an obsessive father desperately trying to keep his teenage daughter safe. His children's novel, Shadow Forest, is a fantasy that begins with the horrific death of the protagonists' parents. It won the Nestlé Children's Book Prize in 2007.

He also published several novels, the most famous of which are:
_Haig's vampire
_The Humans
_How to Stop Time
_The Midnight Library

As of 2015, Haig was married to Andrea Semple, and they lived in Brighton, Sussex, with their two children and a dog. Haig identifies as an atheist. He has said that books are his one true faith, and the library is his church.

Some of Haig's work—especially part of the non-fiction books—is inspired by the mental breakdown he suffered from when he was 24 years old. He still occasionally suffers from anxiety.