One of the blogs I like to read is by Alan Joel, called the Esoteric School of Shamanism and Magic Blog. In his most recent post he advises that when you get a new Tarot deck you should "throw away the book that comes with the Tarot deck." By that I assume he means the "Little White Booklet" (LWB) that often comes inside a box of Tarot cards. More and more decks are coming with larger booklets or even full-sized books, and I'm going to guess (I could be wrong) he doesn't mean those.
Often, the LWB provides the most minimal of information. So to my mind it would be better not to throw out the LWB, but rather to study it in conjunction with other books or courses on the Tarot. Joel does