BEIJING, July 10 (Xinhuanet)-- Madonna is the subject of a new memoir by her brother, which implies she really does love her husband, director Guy Ritchie, but not as much as she loves her career and herself. The book "Life With My Sister Madonna" written by Christopher Ciccone is scheduled to hit the shelves next Tuesday but it has been seen by journalists on Wednesday.

The 342-page book, published by Simon Spotlight Entertainment, arrives at a time when Madonna has been linked to the breakup of the marriage between New York Yankees star Alex Rodriguez and his wife, Cynthia Rodriguez, who filed for divorce Monday.

Singer Madonna (L) and director Guy Ritchie arrive on the red carpet at the 61st Cannes Film Festival May 21, 2008.

According to her brother, she and Ritchie love each other, despite rumors that they are splitting up.

Christopher Ciccone, 47, worked often with his older sister, designing and directing her "Girlie Show" tour in 1993 and serving as artistic director of her 1991 documentary, "Madonna: Truth or Dare." But in his book, he says they are no longer close.