"Street Lit," and the Market for Black Authors

I sent my friend Ignoto this link on street lit. Ignoto, who is in a position to know, responds with this tidbit:

Interesting thing about street lit---the whole phenomenon has hurt bookstore sales for some black authors. The mystery bookstores found that they couldn't keep Walter Mosley's books on display, because they got stolen with disheartening regularity. Not because Walter's fans are thieves, but because shoplifters had learned to target black-interest books that they could market to curbside booksellers. (The stores came reluctantly to this decision, as the store personnel themselves were all major Mosley fans).