The third novel in the highly acclaimed BOOKS OF BABEL series, set in a labyrinthine world of menace and wonder.

On the orders of the mysterious Sphinx, Thomas Senlin and his crew are dragged ever further into the Tower's conspiracies. Meanwhile, the hods climb the Black Trail in darkness and whisper of their king.

Praise for the series:

'One of my favourite books of all time' - Mark Lawrence, author of PRINCE OF THORNS

'I'm wildly in love with this book' - Pierce Brown, author of RED RISING

'Brilliant' - Publishers Weekly

'I loved it' - Django Wexler, author of THE THOUSAND NAMES

'these books are absolutely incredible' - THE QUILL TO LIVE

'Spectacular . . . fabulously gripping' - BookBag

'An impressive display of imagination and humour' - SciFiNow

'An engrossing, intoxicating delight' - Forbidden Planet

'A beautifully written, highly engaging, page-turning masterpiece' - Fantasy Book Review