Property designer Edoardo Mapelli Mozzi, 37, has described How To Raise Successful People as essential reading since his marriage to Beatrice, 32.
The revelation emerged days after the princess’s younger sister Eugenie, who married Jack Brooksbank two years ago, announced her pregnancy.
Edo, who is already the father of four-year-old son, Christopher Woolf, from his relationship with American architect Dara Huang, explained how he has become hooked on a child-raising technique developed by author Esther Wojcicki, 79, right, using the acronym “trick”.
He said: “There is nothing more important than raising and educating our kids and doing it well and she has achieved this using the word trick: T is for trust, R is for respect, I for Independence, C for Collaboration and K is for Kindness.”
