BOOK SERIES
Hollow Earth
3 main books1 additional works
Hollow Earth is John Barrowman and Carol E. Barrowman's magical childrens series about twins who can bring art to life.
Books in the series
Books in reading order
Additional works
SERIES PUBLICATIONS
Publication timeline
Main-series books by publication year. Unconfirmed TBA dates are excluded.
2012–20143 dated main books