In the eighth book of the Alien Next Door series, Harris and Roxy have stowed away aboard Zeke's spaceship and are flying to his home planet of Tragas!

Harris and Roxy have hidden away on Zeke's family's spaceship and are headed to Tragas! Zeke's parents freak out when they discover the kids aboard, but they've come too far to turn back. So that gives Harris and Roxy two whole days to explore the alien planet with Zeke while the ship refuels before they all have to fly back to Earth. But, much like Zeke had to on Earth, they have to blend in. Will they be able to hide the fact that they're the aliens on this new planet?

In the sixth book of the Alien Next Door series, Harris explains Valentine's Day to Zeke, and Zeke develops a crush!

Valentine's Day is right around the corner, and Harris explains the holiday and its traditions to Zeke. When Zeke gets an anonymous valentine, Harris is excited to help him figure out who sent it, but Zeke is confused at the customs of Earth, and his efforts to get a girl to notice him by doing what Harris tells him to don't go quite right. Will Zeke be able to turn things around and show his valentine his feelings?

In the fourth book of the Alien Next Door series, Halloween is just around the corner, and Harris is excited to share the holiday with Zeke, who doesn't even need a costume!

Harris is ready for Halloween and is very excited when he sees Zeke's "costume," which is just his true alien form. Harris is sure Zeke will win the costume contest at school! Zeke also uses his powers to help Harris make the best costume he's ever had, but Roxy feels left out, as she and Harris usually make costumes together every year.

On Halloween, one of the other kids at school is jealous of Zeke's amazing costume and plots to sabotage it. Will Harris and Roxy be able to stop him and help Zeke win the costume contest?

In the third book of the Alien Next Door series, Harris knows Zeke is an alien, and they go away for a weekend trip as Beaver Scouts. Will Harris be able to help Zeke keep his secret when another scout starts suspecting something?

Zeke has revealed to Harris that he's an alien and Harris is thrilled to have an alien best friend! This weekend, Harris has a Beaver Scout outing in the wilderness, so he invites Zeke to join in on the fun. Zeke doesn't quite understand all the activities, like sleeping outside and telling ghost stories, and he is a little careless with using his powers, which leads one scout to become a little suspicious. Will Harris be able to help Zeke hide his identity from everyone?

In the seventh book of The Alien Next Door series, Zeke's parents have completed their research on Earth, and Zeke may have to move away!

Zeke the alien comes home one day to find his parents packing. They tell him that their mission researching Earth is finished, and they're all going back to Tragas to be assigned to a new planet. Zeke is sad to once again leave and go to an unfamiliar place, especially now that he has great friends on Earth in Harris and Roxy. Harris is just as upset when Zeke tells him, and together, they come up with a plan to try to stop Zeke's departure. Will they be able to stop his family from going back to their home planet?