There are 3 books in the Adventures of the PSS 118 series. The newest book is Last Summer in Outer Space which came out in 2023.

1
Seventh Grade vs. the Galaxy

Book cover of Seventh Grade vs. the Galaxy

Percy Jackson meets Star Trek

PSS 118 is just your typical school―except that it's a rickety old spaceship orbiting Ganymede, a moon of Jupiter. Jack's dad used to be the science teacher, until he got fired for tinkering with the ship. Now Jack just wants to get through the last…

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2
Eighth Grade vs. the Machines

Book cover of Eighth Grade vs. the Machines

After the entire population of Earth's solar system is whisked away by alien technology, Jack and his classmates and teachers aboard the PSS 118 are the only humans left. It's up to them to find and rescue the rest of humanity―if they can avoid the aliens hunting them down, steer…

3
Last Summer in Outer Space

Book cover of Last Summer in Outer Space

Jack's eighth-grade year aboard the PSS 118 is coming to an end. And the students and faculty of the best public schoolship in the galaxy (if it does say so itself) are on the verge of completing their mission. If all goes well, they'll soon foil the sinister alien plot…