After 75 years, Gertrude Chandler Warner’s The Boxcar Children series is becoming a trio of animated films, Shout! Factory and Legacy Classics announced Thursday.

The currently untitled Boxcar Children films will be the first releases from a new partnership between Shout!, a multi-platform media distributor, and Legacy Classics, a production company with several VFX and animation studios around the world. The long-term, multifaceted production partnership and distribution deal aims to release a minimum of four films (both animated and live-action) across both of its first two years, with an emphasis on family-oriented titles based on best-selling book series from both the past and present day.

“Our films will be based on some of the most cherished books in children’s literature,” Legacy Classics’ Dan Chuba, who served as the executive producer of visual effects on films like This Is the End and Prometheus, said in a statement. “Shout’s ongoing success with family entertainment and their entrepreneurial spirit make them an ideal partner. Together, we are committed to creating family entertainment that has a positive social impact on children and families around the world. We could not be happier!”

The Boxcar Children series, a multi-title saga revolving around four orphaned children living in an abandoned boxcar in the woods, was first published by Rand McNally in 1924, though it was reissued in a new, shorter format by Albert Whitman & Company in 1942. According to a press release, The Boxcar Children books are read by over 1 million children in schools across North America each year, and 70 million books have been sold worldwide since the series’ introduction.

A previous animated adaptation of The Boxcar Children, featuring the voices of J.K. Simmons, Martin Sheen, Illeana Douglas, and Joey King, was released in 2014. Further details on the upcoming Boxcar Children films, including which books will be getting movie adaptations, have not yet been released. The first movie in the series is set to come out in 2017.