I buy the new edition each year when it comes out.

From amazon.com:

"BOOK DESCRIPTION
Release date: August 29, 2012 | Series: Leonard Maltin's Movie Guide
More than 16,000 capsule movie reviews, with more than 300 new entries

“Maltin’s movie guide is still ****”--USA Today
NEW
More than 13,000 DVD and 13,000 video listings
NEW
Up-to-date list of mail-order and online sources for buying and renting DVDs and videos
NEW Newly updated index of leading performers
MORE
Official motion picture code ratings from G to NC-17
MORE
Old and new theatrical and video releases rated **** to BOMB
MORE
Exact running times—an invaluable guide for recording and for discovering which movies have been edited
MORE
Reviews of little-known sleepers, foreign films, rarities, and classics
AND
Leonard's all-new personal recommendations for movie lovers

EDITORIAL REVIEWS
"Maltin's movie guide is still * * * *." - USA Today
"The go-to choice for both film geeks and casual couch potatoes." - The New York Times Book Review
"I recommend Leonard Maltin's guide, which has become standard." - Roger Ebert's Video Companion

ABOUT THE AUTHOR
Leonard Maltin is one of the country's most repected film historians and critics. He appears regularly on Entertainment Tonight, hosts Secret's Out on Reelz Channel, and introduces movies on DirecTV. He also teaches at USC School of Cinematic Arts. He and his wife Alice are the proud parents of Jessie, who helps her father interpret matters of pop culture.

PRODUCT DETAILS
Paperback: 1664 pages
Publisher: Plume; 1 Original edition (August 29, 2012)
Language: English
ISBN-10: 0452298547
ISBN-13: 978-0452298545
Product Dimensions: 5.5 x 2.2 x 8 inches
Shipping Weight: 2.5 pounds
Average Customer Review: 4.1 out of 5 stars (108 customer reviews)"