To celebrate the author's 100th birthday this Thursday, Houghton Mifflin is publishing a new edition of Roger Tory Peterson's classic, Peterson Field Guide to Birds of North America ($26, 9780618966141/0618966145), that for the first time combines the Eastern Birds and Western Birds guides in one volume, has new maps, 40 new paintings, new range maps and new text. The book also has flown across the digital divide: it includes access to three hours of video podcasts to make bird watching and identification easier.

To help promote the title, Lee Allen Peterson, Roger's son, will appear on the Diane Rehm Show tomorrow and on the Early Show on Thursday.

A Field Guide to Birds has sold more than 8 million copies in five editions and spawned a Peterson franchise that includes guides to trees, plants, wildflowers, edible plants, insects, medicinal plants and herbs, butterflies and moths, rocks and minerals--you can identify the picture.