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In the age when even books are being downloaded, it is actually a treat to be able to hold a book in your hands, read it and turn the pages. If technology is making books collectible, then that fact is celebrated every day at Green Apple Books. This extensive retailer and online store will not only have your purchases delivered to your door, they will also buy back your old books and give you credit for them on your purchases. There are always special events going on in the store like readings and book signings, so check the website regularly. Also, while you're online or in the store, pick up a cool Green Apple Books t-shirt or bookbag.

People who love books love Litquake, the yearly literary festival held every fall in San Francisco. Renowned authors are on hand for lectures and book signings, and interesting panels, workshops and parties are also part of what makes Litquake such an essential event for both readers and writers of all backgrounds. One of the highlights of this event is the three-hour Lit-Crawl through the Mission District that features stops at galleries, bookstores, bars and cafes.

San Francisco's Cable Car Museum has the distinction of being recognized as one of the top 10 free attractions in the world. It also offers a unique peek into how San Francisco's signature means of transportation is constructed and operated. You will be able to take several photos from the second level that overlooks the various exhibits, as well as get close to different displays that feature vintage cars in either completed form or in various parts. The various informative displays illustrate the compelling history of cable cars.