The first in a new YA sci-fi series from the brother and sister writers, this follows on from the "Hollow Earth" series and features the same central characters, twins Matt and Em Calder, who are now 16. They can bring art to life, and travel in time through paintings. John Barrowman has worked in TV, musical theatre and film, and played Captain Jack Harkness in "Doctor Who" and "Torchwood". His sister Carole E. is a talk show host and teacher. *Also appeared in April Buyer's Notes*

John Barrowman has worked in television, musical theater, and film, and stars as Captain Jack Harkness in Torchwood and Doctor Who. His sister, Carole E. Barrowman, is a talk show host and teacher in Milwaukee, Wisconsin. They are the authors of Hollow Earth, Bone Quill and The Book of Beasts.