The Encyclopedia of Collectibles Time Life Books Art Glass Automobilia Autograph

The Encyclopedia of Collectibles," and a specific focus area mentioned on its cover is "Art Glass." Explanation: Title: The prominent title on the book's cover is "The Encyclopedia of Collectibles." Focus Area: On the bottom right corner of the image, below the main illustration of various collectible items, the text "Art Glass" is visible, indicating a specific subject covered within the encyclopedia. Other focus areas are listed on the upper right side of the cover, including Advertising, Automobilia, Banks, Roseville Ware, Playing Cards, and Tobaccos