The answer to that question relies entirely on your imagination. We have the story as it was presented to us by the author. The rest is up to you. If you'd like, you can write your own fanfiction ending to the story, and it can be anything you want it to be.
"The Boy Who Couldn't Sleep and Never Had To" by DC Pierson has 256 pages.
226 pages in the book
Slaves of Sleep has 206 pages.
Newtons Sleep has 288 pages.
Hot Sleep has 309 pages.
Fields of Sleep has 288 pages.
Troubled Sleep has 432 pages.
Sleep No More - anthology - has 374 pages.
Yellow Men Sleep has 343 pages.
"Dr. Seuss's Sleep Book" has 64 pages.
While Mortals Sleep - book - has 272 pages.
The Never War has 352 pages.
Never Sorry has 272 pages.
I Never Liked You has 200 pages.