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...