Singer Madonna, the 47-year-old pop diva and queen bee of modern music, is almost up on the top pedestal with the incomparable J.K. Rowling as the female monarch of young people's fiction.
After rushing out five books in two years, she has become one of the most successful children's authors in the world.
But Madonna's books are very different from the epic adventures of Harry Potter. Her books are short, simply-told tales with a modern moral at the end.
In her latest best-seller, Lotsa de Casha, she puts out a straightforward moral: money can't buy you happiness and you have to learn to share what you have with other people. Only then will you live a contented life.
This is quite a lesson to swallow from a multimillionaire who would seem to have everything. But she practises what she preaches in Lotsa de Casha, as all the royalties from her writing go to a children's charity.
The message is kept appealingly on track, right to the end of Lotsa de Casha. Madonna has the common sense to keep the story simple and focused all the way through and doesn't allow herself to be sidetracked.