For the book, the princess chose to draw a dog, matching the zodiac sign of the upcoming Chinese year.
On the first page is a poem by the Princess narrating the various dog breeds and comparing them to different kinds of friends. It draws a parallel between the close friendships and protective loyalty given by pet dogs and good friends.
The diary has two colours, purple and violet, and is for sale at Bt150 each.
The books include drawings of the 12 zodiac signs by the Princess. Each is sold for Bt50.
Both books were produced to commemorate the 12th anniversary of the Foundation.