This book is from the Vinciana brand and is part of the Leonardo Collection and talks in detail about the formation of the skull and other parts of the body.
Cretacolor Assorted Leads are best for when precise control is needed, leads will hold a sharp point for finely detailed work.
Cretacolor calligraphy inks are ideally suited for brush and nib work.
Cretacolor monolith eraser for erasing, retouching and removing marks from lead pencil drawings. These erasers can be used on delicate paper without tearing.
Nib Style: crown, point, shorthand, scroll 6 & copying