No mystery here - Da Vinci Code author Dan Brown has debuted at the top of the Irish fiction book chart with his new novel Inferno.

Brown's latest, which has been savaged by critics, has knocked Gillian Flynn's near constant number one seller Gone Girl off the top of the bestsellers' list.

Check out the Top 10 lists.

Top 10 Fiction

1. Inferno Dan Brown (Random)
2. Gone Girl Gillian Flynn (Orion)
3. Secret Keeper Kate Morton (Macmillan)
4. Mystery of Mercy Close Marian Keyes (Penguin)
5. Strumpet City James Plunkett (Gill & Macmillan)

6 Guest List Melissa Hill (Hodder & Stoughton)
7 Six Years Harlan Coben (Orion)
8 Storyteller Judi Picoult (Hodder)
9 Five Days Douglas Kennedy, (Random)
10 With All My Love Patricia Scanlan (Simon & Schuster)

Top 10 Non Fiction

1. Get Your Sh*t Together Ruth Field (Little, Brown)
2. Staring at Lakes Michael Harding (Hodder & Stoughton)
3. Disorganised Crime Alan Croghan (Penguin)
4. Paid For Rachel Moran (Gill & Macmillan)
5. We'll Meet Again Colm Keane (Capel Island Press)
6 Now and Forever Bernie Nolan (Hodder & Stoughton)
7 Calm The Soul Poor Clares (Hodder & Stoughton)
8 Fast Diet Michael Mosley & Mimi Spencer (Faber)
9 2 Day Diet Michelle Harvie & Tony Howell (Random)
10 Irish History Micropedia Various (Parragon)