A movie about Donn Fendler, the boy who survived nine days alone in the woods of Mount Katahdin in the 1930s, will be released this summer, a production company announced recently.

“It’s been a very long journey since embarking on this project in 2010, but we’re so happy to finally share all the hard work that’s been put into making this film a reality,” Great Mountain LLC posted on Facebook. “More details soon, but ‘Lost on a Mountain in Maine’ the feature film will be a reality once and for all this summer.”

The film was produced by Sylvester Stallone’s Balboa Productions, according to screendaily.com.

For generations, a book about Fendler’s ordeal (also called “Lost on a Mountain in Maine”) has been required reading for schoolchildren in Maine and across the country.

In retirement, Fendler visited Maine classrooms to talk about how he managed to survive.

Amazon lists the book as #1 Best Seller among children’s books describing it as a “gripping survival story for all ages.”

Fendler was just 12 when he got lost during a hiking trip when heavy fog rolled in. He wandered 35 miles over nine days until he ended up at a hunting camp in Stacyville.

“With rainstorms, black bears, and his fear of being lost forever, Donn’s journey is a physically, mentally and emotionally charged story told from the point of view of the boy who lived it,” the Amazon description reads.

Maine State Historian Earle Shettleworth said Fendler’s disappearance in 1939 made national headlines and captivated the country through newspaper and radio reports.

“It’s 1939 and the world is literally on the brink of World War II,” Shettleworth said. “The 30s were a period where America is still, even 10 years after the stock market crash, there’s still the lingering effect of the Great Depression. The 30s are a period when people look to major events to divert them from their present situation.”

After he survived the ordeal, Fendler was honored with parades in Maine and by Gov. Lewis Barrows, who gave him a gold medal.

The following year, President Franklin Delano Roosevelt presented him with an award for valor. He went on to a successful military career and died in 2016 at the age of 90.

“If you put the Donn Fendler experience in context of this time, this fits nicely with a youthful hero who defies all the odds of surviving in the untamed wilderness,” Shettleworth said. “He was a living legend.”