The Star and the Strange Moon by Constance Sayers

From the author of A Witch in Time comes a haunting tale of ambition, obsession, and the eternal mystery and magic of film.  

A vanished star. A haunted film. A mystery only love can unravel…
 
1968: Gemma Turner once dreamed of stardom. Now the actress is on the cusp of obscurity. When she’s offered the lead in a radical new horror film, Gemma believes her luck has changed—but her dream is about to turn into a nightmare. One night, between the shadows of an alleyway, Gemma disappears on set and is never seen again. Yet, Gemma is alive. She’s been pulled into the film. And the script—and the monsters within it—are coming to life. Gemma must play her role perfectly if she hopes to survive.
 
2007: Gemma Turner’s disappearance is one of Hollywood’s greatest mysteries—one that’s captivated film student Christopher Kent ever since he saw L’Étrange Lune for the first time. The screenings only happen once a decade and each time there is new, impossible footage of Gemma that shouldn’t exist. Curiosity drives Christopher to unravel the truth. But answers to the film’s mystery may leave him trapped by it forever.

"A sweeping tale of dark magic, artistic obsession, and a love unbound from the limits of time, The Star and the Strange Moon captivates with lush prose and moments of poignant, heartbreaking beauty." —Paulette Kennedy, author of The Witch of Tin Mountain 
 
For more from Constance Sayers, check out:
A Witch in Time
The Ladies of the Secret Circus