Libro 1

Being Happy!

di Andrew Matthews
June 19th, 1990
Inglese
Brossura

Libro 2

Making Friends

di Andrew Matthews
June 19th, 1991
Inglese
Brossura

Libro 3

February 15th, 1999
Inglese
Brossura

Libro 4

Being a Happy Teenager

di Andrew Matthews
January 1st, 2002
Inglese
Brossura

Libro 5

Happiness Now!

di Andrew Matthews
October 1st, 2005
Inglese
Brossura