Here's a rare book that was up for sale on the Book Palace website recently (here).
It was described thus...The book focuses on the female form in graphic art, with text by Romero, giving insight to his process and development.
Self-published by Romero in 2015, the softcover book, published in black and white, was a follow-up to another self-published title, Erotic Sketches 100, published the previous year. The 70-page book features 122 drawings over 66 pages, the illustrations, accompanied by small insights by Romero about this type of art, advising on the best way to draw the best scenes or bodies.