Hallett has aced it... Every page is a joy, with laugh-out-loud moments... The startling final reveal crowns Hallett as the queen of unreliable narrators * Sunday Times *
Even better [than The Appeal]... This fiendishly clever book manages to be both tricksy and surprisingly moving * Guardian *
Hallett swoops in with a bravura final section that sheds new light on everything you've read before and will leave you amazed at her ingenuity. It's all right there in the code * New York Times *
A tour de force - a genuinely complex puzzle with real clues to be solved... A mind-bending, heartwarming mystery that is not to be missed * Observer *
A big-hearted, ingeniously constructed mystery... A book that will engage your emotions as much as your wits * Sunday Express *
Such a clever whodunnit, and she's an absolute master of what she does -- Richard Coles, author of MURDER BEFORE EVENSONG
A "cancelled" book is at the heart of Hallett's much-acclaimed, complex novel. Elegant, puzzling metafictional writing that pleasurably tasks readers with extricating the truth * Financial Times *
A thoroughly unusual thriller * Daily Mail *
I came for the acrostics and stayed for the rich characterisation and sly humour * Telegraph *
A brilliantly clever, deceptive mystery with a unique twist * Heat *
If you love a puzzle, you'll enjoy this novel packed full of mystery and intrigue. Perfect for Richard Osman and SJ Bennett fans * Yours *
Ingenious * Good Housekeeping *
Hallett is a deft storyteller, and her latest combines humor and pathos... will keep readers in suspense until the final page * Washington Post *
Enid Blyton meets Agatha Christie with a cracking twist. Witty and wonderful -- Marion Todd
A wonderful book, clever and surprisingly compassionate, constantly wrong-footing the reader on its way to an ingenious and wholly satisfying final reveal -- Brian McGilloway
Fiendishly clever... Golden Age Christie-esque puzzle meets The Usual Suspects. Outstanding. Unlike anything you'll ever read -- Imran Mahmood, author of I KNOW WHAT I SAW
The Twyford Code turned my brain inside out. It totally foxed me. So clever and totally brilliant -- Lisa Hall, author of THE PARTY
I thoroughly enjoyed it. It really pulls you in, and makes for addictive reading -- Faith Martin
Filled with numerous clues, acrostics, and red herrings, this thrilling scavenger hunt for the truth is delightfully deceptive and thoroughly immersive * Publishers Weekly *
Addictive * Waitrose Weekend *
Puzzle fans will undoubtedly enjoy Hallett's bighearted thriller * Library Journal *
A peculiar, complex labyrinth where reality and fantasy overlap... Sad, funny, weird, and truly original, this is a hypnotic tale with an extraordinary ending * Booklist (starred review) *
An elegant puzzle of a book, which entombs an exquisite little heart -- Matt Wesolowski, author of SIX STORIES
A multi-layered, multi-voiced mystery unlike anything I've read before. It's packed with tricky clues, red herrings and cunning acrostics, but ultimately it packs an emotional punch you don't see coming -- Kate Griffin, author of KITTY PECK AND THE MUSIC HALL MURDERS
A highly original, immersive story that draws you in from the very beginning and keeps you thinking. Smithy was a fascinating character with whom it was a pleasure to spend time -- S.V. Leonard, author of THE ISLANDERS
Packed with perplexing puzzles and linguistic legerdemain, but behind that is a poignant tale of redemption -- D.V. Bishop, author of CITY OF VENGEANCE
I absolutely love it. The Secret Seven for grownups -- Faith Hogan, author of WHAT HAPPENED TO US?
An ingenious novel that allows the reader to investigate the case themselves. Full of twists and credible characters, I loved every single word -- Louise Mullins, author of I KNOW YOU
A superb mystery with true heart at its centre. No one does twists quite like Janice Hallett -- Sophie Flynn, author of ALL MY LIES
Janice Hallett is a genius at conjuring a whole world through dialogue, and yet there's so much more to it than that. Pure genius -- Leonora Nattrass, author of BLACK DROP
A stunning book. A fiendishly clever yarn that hooked me from the first line to the final revelation -- Chris McDonald, author of ROSES FOR THE DEAD
Just finished the brilliant The Twyford Code by Janice Hallett. It's twisty, clever and deceptive, with clues dropped along the way - although I missed most of them! Loved it! -- Guy Morpuss, author of FIVE MINDS
I read the last fifty pages of The Twyford Code with my mouth hanging open and my brain very close to exploding. There is clever and then there's this. -- Laura Pearson, author of I WANTED YOU TO KNOW

Janice Hallett studied English at UCL, and spent several years as a magazine editor, winning two awards for journalism. Her debut novel, The Appeal, was a Sunday Times bestseller, the Sunday Times 2021 crime book of the year, and shortlisted for the Waterstones book of the year. Janice lives in West London.