Ithaka O. 
Moonlight Through the Manhole [EPUB ebook] 
a long short story

In a town where four children have vanished without a trace, one curious first-grader believes he knows the extraterrestrial truth.
When Billy Clifford spots mysterious flashes of light beneath a manhole cover, he embarks on a nocturnal adventure that leads him into the winding passages of Everton’s sewer system. What he discovers below challenges everything he thought he knew about his missing classmates—and himself…
*A bittersweet tale of childhood wonder, plucky courage, and invisible scars that bind outcasts together.