- In this new collection, Superboy, Robin, Kid Flash, Aqualad, Miss Martian and Artemis make their way to Atlantis to foil Ocean-Master's plan to purify the underwater city.
- Collects YOUNG JUSTICE #14-19!
- 14. "Under the Surface..."
- 15. "...Here There be Monsters"
- 16. "Common Denominators"
- 17. "Uncommon Dominators"
- 18. "Monkey Business"
- 19. "Gorilla Warfare"
- This trade paperback reuses the cover artwork of issue #18. The back cover is reused from issue #19.
- Unlike the earlier two collected editions, stories in this trade paperback are not separated by textless covers; instead, they are reproduced in the back.
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