John writes about Sherlock 's cases on his blog , which attracts clients to them .
In the second series , John is referred to as Sherlock 's P.A. and is not shown working any other job .
John writes about Sherlock 's cases on Sherlock 's blog , which attracts clients to them .
In the second series , John is referred to as Sherlock 's P.A. and is not shown working any other job .