[a] Many authors have written more than one book about Madonna and these have been published in multiple languages other than English, including German, French, Dutch, Spanish and Italian.

[2] Maura Johnston said that "the appetite for books on Madonna is large, and the variety of approaches writers, editors, and photographers have taken to craft their portraits is a testament to how her career has both inspired and provoked".

[6] According to critic Paul Northup who wrote in Third Way magazine, "eminent authors and academics have pored over her tirelessly since she burst onto the pop scene in the early Eighties.

[11] Pamela Church Gibson from University of the Arts London realized it saying in Fashion and Celebrity Culture (2013), "there is a veritable library of literature available" on Madonna.

Morton's biography was criticized by Madonna herself and she was also against the release of Ciccone's book, which ultimately led to a rift between the siblings.