When fifteen-year-old Xander and his family move into an old, abandoned house in the middle of a dense forest outside of a small California town, they discover that not only are some of the rooms portals into other places, but that malevolent forces are at work.

When eleven-year-old Olive and her distracted parents move into an old Victorian mansion, Olive finds herself ensnared in a dark plan involving some mysterious paintings, a trapped and angry nine-year-old boy, and three talking cats.

With their mother still missing after going through a Civil War time portal in their spooky house, and their father in jail under a false accusation, Xander, David, and their younger sister continue to try to bring their mother back, now with the help of an old relative who has turned up unexpectedly.

Cordelia, Brendan, and Eleanor Walker, aged fifteen to eight, must rely on a mysterious book to face the Wind Witch and her father, the Storm King, who have kidnapped Dr. and Mrs. Walker and brought them to a strange world of magic.

Cordelia, Brendan, and Eleanor Walker, aged fifteen to eight, must rely on a mysterious book to face the Wind Witch and her father, the Storm King, who have kidnapped Dr. and Mrs. Walker and brought them to a strange world of magic.

In this story told mostly through letters, children's book author, I. B. Grumply, gets more than he bargained for when he rents a quiet place to write for the summer.

Josie must discover the connection between a strange house in the woods, her grandmother's stories, and missing children, or risk losing her sister to dark magic.

"With their last adventure just barely over, the Walker kids thought life would finally go back to normal. But things don’t remain calm for long... especially when the colossus Fat Jagger turns up in San Francisco Bay--and he’s in danger! With the police closing in, the Walkers must figure out how to save their giant friend. When a frost beast is spotted in Santa Rosa--and more mystical creatures start appearing all over America--it’s soon clear...

A timid, unpopular boy learns about courage, love, and luck through a school project involving a strong-willed elderly woman, the abandoned house where her son died, and the legend of the Firebird.

Tolly comes to live with his great-grandmother at the ancient house of Green Knowe and becomes friends with three children who lived there in the seventeenth century.