Janitor 52 (Janitor 51 Book 2)

Let's face it. No matter how secret or secure a facility is, someone still has to clean it. Enter everyone's favorite night janitors. This time, they have a special assignment. Flown down to a super secret base, known only as Area 52, our heros in blue coveralls are to deep clean the place. But things go awry and once again it is up to Ajax and Jose to save the world. Now the fate of Earth depends on two night janitors and their mops.