The term BOOK DEPOT can be broken down into two crossword solutions: BOOK and LIBRARY. BOOK is a noun that refers to a physical or digital collection of written works, such as novels, poems, plays, and other texts. LIBRARY is a noun that refers to a collection of books, periodicals, and other materials available for borrowing or reference. A BOOK DEPOT is a place where books are sold, rented, or exchanged. It may also refer to a LIBRARY or bookstore.