A small change could make a big difference for Dolly Parton's Imagination Library.
The organization delivers a free book every month to registered kids from birth to five years old.
More than 17 thousand kids are signed up in Knox County alone.
Now starting in January, many of those books will be soft cover instead of hardback.
"It's going to reduce the cost, and it's going to make the books easier to deliver," said Mary Pom Claiborne with the Knox County Library. "Some mailboxes are too small for hard cover books, so making them soft cover will make them easier to deliver."
Rising postal charges had worried officials that some counties might be forced to drop out of the program.
The first and last books children receive will still be hard cover. The younger kids will get board books, designed for their age group.