Book excerpt: As the leaves change colour and the air turns crisp, our thoughts naturally turn to the upcoming holiday festivities. The folks at LIFE have also been thinking about these days of good cheer, and have been busy collecting the prettiest and most fun-filled photos of the winter holidays. LIFE PICTURE PUZZLE: HOLIDAY is 144 pages filled with all the moments that warm our hearts and the most amusing, challenging and beautiful puzzles drawn from Thanksgiving, Hanukkah, Christmas and New Year's. See if you can spot the differences as the Macy's Thanksgiving Day Parade floats by or catch the funny ornaments that have jumped on the Christmas tree.