The "Story of" series of Snow White books were produced in 1938 by Whitman Publishing Company (Racine, Wisconsin). Sold as a boxed set of eight, each illustrated story book was devoted to one character--the princess and the individual dwarfs. Printed on an inexpensive pulp stock with somewhat heavier stock covers, they were designed to be read and colored by younger readers. Each title measures 7.5" x 11" and contains 24 pages.
Each of the books are marked 1044, and the set came housed together in an illustrated box.
Info and images via Heritage Auctions.
This set appears on page 839 of Hake's Official Price Guide to Disney Collectibles (2nd ed.), 2007...
The books do show up for sale often enough online, both individually and as a complete set. Yet, they tend to be quite expensive. Finding ones that are free from marks and damage will obviously cost you the most.
Have a closer look at a couple of the titles: