[2][3] Rees has written about his Welsh heritage in his 2011 memoir Bred of Heaven.
The book caused controversy when Rees was upset by a review in the Daily Mail by journalist Roger Lewis, who called Welsh a "moribund monkey language".
[4] Member of Parliament Jonathan Edwards also referred the review to both the Press Complaints Commission and the police.
[5] In 2010 Rees released his book I Found My Horn,[6] which was adapted for the stage.
[7][8] He also wrote a biography of Florence Foster Jenkins in 2016, which was adapted into the film of the same name starring Meryl Streep and Hugh Grant.