“Jerry proves that one can grow old gracefully and with great humor, while maturing not at all.” — Dave Jaffe, author of “Sleeping Between Giants: Life, If You Can Call It That, With a Terrier” If age is just a number, then Jerry Zezima gets an A in creative math. In this, his sixth book, the syndicated humorist looks at life through rose-colored glasses — for which he doesn’t even need a prescription. Whether he’s acting silly with his grandchildren, clowning around at his fiftieth high school reunion, or bombarding his wife with stupid jokes, Jerry Zezima is a man for our time. “One for the Ageless: How to Stay Young and Immature Even If You’re Really Old” is a merry romp through the golden years, a funny guide to surviving retirement, a heartwarming chronicle of long-overdue family reunions, and a book that will make you feel like a kid again.