Magnificent. A major new talent. -- Richard Osman

Chillingly well-observed. - Observer

A deft, razor-sharp debut that effortlessly bestrides crime and comedy. Jonny Sweet is annoyingly talented. -- Erin Kelly

A pitch-black debut, lurching from comedy of manners to grand guignol, will be catnip to
fans of Saltburn - Guardian

A horribly compelling tale. - Daily Mail

Tom Ripley meets The Wych Elm in this creepy, acerbic, darkly funny thriller about loneliness, ambition and the lengths we go to to escape ourselves. Sweet is as interested in themes of love and revenge as he is in skewering the elite, in a novel whose dialogue is pin-sharp and whose pages ripple with tension. A hugely enjoyable and impressive debut. -- Emma Stonex

Fresh, frightening, bittersweet and brutal. The Kellerby Code is wonderfully witty and delightfully dark. -- Chris Whitaker

This is a dastardly romp for fans of 'Saltburn', The Talented Mr Ripley and dare I say a horrible little book called Death of a Bookseller . . . It's a lot of fun with some gorge prose. -- Alice Slater

A subtle and gripping thriller for fans of The Secret History and talented The Talented Mr. Ripley' -- Claire McGowan

Fans of Saltburn will enjoy this darkly humorous thriller. - Good Housekeeping

The Kellerby Code is a witty Wodehousian bloodbath of a debut which toys with class, the thin veener of 'good manners', and the brutality running underneath it all while still having a light touch. -- Charlotte Vassell

This is a brilliantly crafted story. Jonny Sweet's wickedly forensic eye for detail puts you so close to the action, you feel you are in the room with the characters. On the one hand it's a story of regret and fear, but on the other it's a superb take down of privilege. A genuine late night, one more chapter, but I've got work in the morning book. -- Ian Moore

Rich and compelling with sly humour at every turn. A cracking debut. -- Heather Darwent

Monstrously funny and dark, yet somehow deeply emotional at the same time, Kellerby is an absolute triumph. - Lovereading

Spiffingly clever drama-noir. - Sainsbury's Magazine

The perfect country house crime novel: Knives Out in book form, packed with deadly charm.