The House and its Boy {Book One in the Runaway Holmes Quintology} ~kid!lock~

John Watson, a healthy, friendly, English boy stumbles upon Sherlock Holmes, a runaway living in the abandoned house next door. At first, Sherlock is standoffish and cold, only wanting to be by himself, and John respects that. But then, Sherlock gets himself hurt and John has no choice but to take care of his secret neighbor himself. A bond of unbreakable friendship grows between them, until the day Sherlock has to leave.