Released on April 5th, 2011
Source- ARC/book from publisher to review
John Stephens' aptly-titled new fantasy trilogy begins auspiciously with a nimble, fast-paced tale of three siblings. Kate, Michael, and Emma have suffered through ten years of odious orphanage "care"; now they have slipped into the care of the eccentric, disturbingly mysterious Dr. Pym. While exploring their new home, the children discover a magical green book. With that discovery, a decade of tedium dissolves into cascades of dangerous time travel adventures and struggles with a beautiful witch and decidedly less attractive zombielike Screechers. High early reader marks for strong characterization and battle scenes (quoted from Goodreads).