Books about the same subject are assigned the same shelfmark number. You'll find the number on the spine of each book. Here is a selection of shelfmarks for Fashion and Footwear:
Fashion design and costume 391
Fashion illustration 741.672
Fashion photography 778.99391
Sewing, clothing 646
Shoes: Fashion 391.413
Footwear: Industry economics 338.476853
Footwear: Manufacturing 685.31
Costume and fashion 391
Library Search is generally the best starting point for finding ebooks in any discipline. However you may find these collections useful to explore.
Pamphlets and Oversize Books
You can search the contents of books from Google Books. But remember, most books are not available in full and the content available through Google Books can change from day to day.