Former First Lady Laura Bush and her daughter, Jenna Bush Hager, appear with Hoda Kotb of “The Today Show” to discuss their new children’s book, “Our Great Big Backyard” — a tribute to our national parks and the importance of connecting with nature, published this month to coincide with the 100th anniversary of the National Park Service. 92nd Street Y, 1395 Lexington Ave., Kaufmann Concert Hall. May 11, 7:30 p.m. Tickets are $27-$45, $15 for those 35 and younger at 92y.org.