 Here's how to find a book at UA Libraries, part two, how to read a call number. A call number is a combination of letters and numbers and tells the user where a book is located in the library. The first two letters say what floor the book is on. Gorgas is organized alphabetically with A starting in the lower levels and working up. You can check the breakdown of locations either on the library website or at the circulation or information desks. The set of three or four numbers following the letters tells you which section of shelves to search. Each of the stacks will have the number range of books shelved there, so you will locate the bookshelf with the range that holds your number. The next set of letters and numbers, after the period, is the book identifier. Once you find which bookshelf to look in, you will check the stickers on the spines of the book for this code. The publication date is also part of the call number, but it's usually not needed to find a book unless there are multiple editions published in different years. Once you have located the book, take it down to circulation and check it out. Or if you are using it in the library, place it back on one of the reshelving locations. Please don't reshelf the book yourself. Thanks and see you next time.