This is book 2 of a trilogy. This one seems to have more emphasis on his comic book and comic strip work, than what appears in the other two books of the trilogy, "Icon" and "Testament." This one includes an 8-page romance comic book story by Frank, from 1952.
There are also plenty more Tarzan/Burroughs/John Carter of Mars works, and terrific paintings of Savage Pellucidar.
Frank's work for Warren magazines, like Eerie, Creepy, and Vampirella get shown and discussed in this book (and also in the other two books of this series).
All of the different eras and decades of Frank's life and career are discussed and shown, in all three books, but always with different paintings, drawings, personal photos, and different commentary by different friends and business associates.
I would recommend starting with "Icon" if you're new to Frazetta's work, but "Legacy" is a close second, containing the works that he is best known for. "Testament" has a focus on unpublished, never before seen work.
One thing that is surprising in all three of these books is seeing how Frazetta would often paint over his paintings, to improve them and change major elements, after they were originally published. So, many of his paintings look different than the way they were printed on paperback covers in the 1960's and '70's.
I am very pleased with all three of these books, but "Legacy" is my favorite of the three, if I really had to choose.