The work is called An Introduction to Heraldry.
It is small, just a brief introduction, but it contains a good number of outlines for the reader to color, and a Chesterton-size serving of Chesterton quotes. In fact, it includes just about every excerpt I could find using AMBER which relates to heraldry and coats-of-arms; some of these are quite interesting, and it is handy to have them all in one place.
I have posted this announcement here with the Saga since the book also contains an appendix which discusses the use of heraldry in the creation of fiction, using five of my coats-of-arms from the Saga as examples. Those are discussed, and I give some background (though NO spoilers) about the underlying meanings of the arms, which are shown in full color on the front cover of the book.