It might be a To Kill A Mockingbird thing, where the generation of kids who read it in school are becoming childbearing age. TKAM was published in the 60s but wasn't a regular part of the curriculum until much more recently.
There's also the bonus of the movies existing now--
Caspian had it's first little boost in 2008, the same year
Prince Caspian was released.
Rosalie Evander Larkin
Starlight Nocturne Grey
www.behindthename.com/pnl/59411