More like SPHDZ Book #2!

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My Teacher Is an AlienSeries
series4 books1989
Adventurous in tone.
“Susan Simmons can tell that her new substitute teacher is really weird.”
from the catalogue
Start with My Teacher Is an Alien →
I Was a 6th Grade AlienSeries
series12 books1999
Science fiction, about aliens, set in contemporary.
“When aliens come to Earth on an interplanetary trade mission, sixth-grader Tim makes friends with the ambassador's son and together they uncover a plot to sabotage the mission.”
from the catalogue
Start with I Was a Sixth Grade Alien →
SpaceheadzSeries
series4 books2010
Science fiction, set in contemporary.
Start with SPHDZ Book #1! →
The Clone Chronicles (M. E. Castle)Series
series4 books2012
About cloning.
“Twelve-year-old Fisher Bas, a science-loving bully magnet, clones himself, only to discover that his double is infinitely cooler than himself.”
from the catalogue
Start with Popular Clone →
Alien in My PocketSeries
series8 books2014
Science fiction, about aliens, set in contemporary and north america.
Start with Blast Off! →
Weird PlanetSeries
series6 books2006
completed
Science fiction, funny in tone, about aliens, set in contemporary and north america.
“When their spaceship crash lands on Earth, Ploo is captured by the Army and taken to the mysterious Area 51.”
from the catalogue
Start with Dude, Where's My Spaceship →