"If you give me a sense of shame, as if it is your fault. I would wear a sweater under my shirt so others did not notice anything, that I would still be the Vialli they knew.
"Then I decided to tell my story and put it in the book … I hope my story can inspire other people at difficult times in their life."
Vialli won the FA Cup as a player with Chelsea and, after being named player-manager following the sacking of Ruud Gullit in February 1998, led the Blues to Victory in the League Cup, UEFA Cup Winners' Cup and UEFA Super Cup the same year .
He also guided Chelsea to Victory in the FA Cup 2000 and Charity Shield but was sacked early in the season following a poor start.
Vialli, who made 59 Appearances for Italy, was in charge of Watford, then in the First Division, for the 2001/02 season but was dismissed after the Hornets only managed 14th place.