Was it low of Christopher Ciccone to write a tell-all about his sister Madonna?

Christopher Ciccone, Madonna's estranged brother, has written a tell-all memoir about his years with the pop icon.  Among the juicy tidbits in Life With My Sister Madonna: her upbringing was more comfortable than she usually claims; she gave her brother his first tab of ecstasy; her husband Guy Ritchie is a homophobe; and Christopher lost respect for her after Madonna visited their mother's grave for her film Truth or Dare.

“My mother’s memory is sacred to me," he told the New York Post recently. "Watching her exploit that, watching her roll around on the grave, that changed my perception of Madonna in a very deep way. I was just ­completely stunned. She has no boundaries.”

Ciccone also told the Post: "You don’t get to where she is by being concerned about other people. It’s like, whatever works best for me right at this moment, that’s what I’m going to do."

The book is out now from Simon & Schuster.