Guy Ritchie believes his wife Madonnas brother penned a tell-all book on the singer because he was desperate for the attention.The filmmaker insists he isn't bothered by Christopher Ciccone's book Life With My Sister Madonna, which made a series of allegations about the Material Girl's private life.But Snatch director Ritchie denies Ciccone's claim he is homophobic - because Madonna wouldn't stand for it.Ritchie says, "I don't make anything of the book. The poor chap wrote it outof desperation. I don't think it'd be intelligent to comment on that. I can't give too much equity in what the chap's gonna write in that book. But you'd be hard pushed to be a homophobe and marry Madonna."