In the 1930s, the cost of a book varied widely depending on a number of factors, including the type of book, the publisher, and the format (hardcover or paperback). In general, however, books were relatively inexpensive during this period. For example, a hardcover novel typically cost around $2.50, while a paperback novel cost around 25 cents. Of course, there were also more expensive books available, such as illustrated editions or special editions. For example, a first edition of The Great Gatsby by F. Scott Fitzgerald could cost as much as $10 in the 1930s.
Additionally, the cost of books was also affected by the Great Depression, which began in 1929 and lasted until the late 1930s. During the Depression, many people were unemployed and struggling financially, which led to a decrease in the demand for books. As a result, some publishers lowered their prices in order to attract customers.