Plunge into the pond and land in an alien world.

When her grandmother dies, 13-year-old Christy inherits an old family secret: the pond behind her house is in fact a portal to another world. What's more, she learns that her grandfather went through the portal when he mysteriously disappeared nine years ago.

As Christy undertakes an adventure into a wondrous and dangerous new world full of strange aliens and advanced technology, she’ll need to trust her instincts and rely on the unique abilities of her friends if she wants to lead everyone safely home.

Book 1: Portal Through the Pond

When Christy first learns of the portal in her backyard pond, she tries to honor her grandmother’s wishes to stay away. But when the local bully pushes her classmate in, she knows only she can rescue him. And maybe she can finally bring her grandfather home, since she’s there anyway…

Book 2: Beyond the Portal

Despite her parents forbidding Christy from returning to the Empty World, she knows it’s her fault her grandfather got captured by the hostile aliens called Ancients. So when 2 of her friends sneak off to see the world, Christy finds the excuse she needs to go back.

Book 3: At the Portal’s End

It seems like each time Christy goes to the Empty World, more goes wrong. But she still can’t stay away. This time, with the excuse of finding her dad and the detective, she ventures on a more dangerous journey and learns that there’s something more sinister about the Ancients’ plans for the other Empty World inhabitants than any of them suspected.

Book 4: The Lost Portal

As both Christy and the grown-ups scramble to help the other inhabitants of the Empty World stay clear of the Ancients’ genocide, they encounter an overgrown pyramid hidden in the jungle. As the last of his race, the pyramid’s guardian enlists their help to protect it. Because if the Ancients gain access to its secrets, no one on the Empty World will be able to hide from them…