Dreams may be more real than we think, as one intrepid dreamer discovers in this YA historical fantasy set in nineteenth century London—perfect for fans of Emily J. Taylor and V. E. Schwab.

LONDON, 1889.

Ashlyn Threadneedle leads a double life. By day she works as a government messenger. By night she escapes into vivid lucid dreams, navigating the Stream—a world in which the only boundary is her own imagination. But when her long-dead mother unexpectedly appears in a dream, Ashlyn is certain the Stream is hiding secrets, ones that contradict everything she knew about her past—and threaten to undo the future of everyone she loves.

In her quest for answers, she joins the Corvi Signum, a secret society of dreamers fighting to protect the Stream from an insidious enemy powerful enough to manipulate people’s thoughts and seize control of London. For Ashlyn to have any hope of preserving her own mind, she must first unravel the mysteries of both her family and the Stream. But a world of dreams is a treacherous place. Time slips backward and forward as easily as sand through an hourglass, and if Ashlyn and her fellow dreamers fail in their mission, then nowhere—neither waking nor sleeping—will be safe.