In this teen historical fantasy set in nineteenth-century London, the boundary between sleep and the waking world begins to dissolve, forcing one audacious dreamer to face a reality more dangerous than any nightmare.

Sixteen-year-old Ashlyn Threadneedle lives a double life. By day she works tediously as a government messenger for Lord Whitaker, but by night she escapes into vivid, lucid dreams, navigating the Stream ' a dreamworld in which time bends and the only limit is her imagination.

When her long-dead mother appears in a dream, secrets of the Stream are uncovered, Ashlyn's life is turned on its head, and the future of her loved ones hangs in the balance. In a quest for answers, she joins a secret society of lucid dreamers who are fighting to protect the Stream from a powerful enemy who wants to manipulate people's thoughts and seize control of London.

Ashlyn must unravel the mysteries of her family and the Stream before the freedom of thought is lost. But the Stream is a dangerous place and Ashlyn must risk both her past and future to protect the freedom of thought itself.

'Incredibly vivid storytelling - atmospheric, dangerous and fast-paced. Pippa Dunn is a wonderful new voice!' ' Jasbinder Bilan, award-winning author of Asha and the Spirit Bird

'The Sign of the Raven is that rare thing: a book at once timely and timeless, which will captivate readers for years to come. Spellbinding, exhilarating and full of heart, Ashlyn's story is destined to be an instant classic.' ' Bori Cser, author of Mirrorwoven

'The Sign of the Raven is an instant classic. Ashlyn's story is exciting, magical, and full of mystery. With a big cast of fascinating characters, high stakes and imagination, The Sign of the Raven is a book to read by torchlight, and it reminded me of why I fell in love with reading. Dunn will surely soon be counted among our best writers for young, curious readers.' ' Anna Fiteni, author of The Wicked Lies of Habren Faire