Let's make this birthday one to remember.

89 years old (Born on October 30, 1935)

Happy Birthday, Robert Caro! May your celebration be as meticulously detailed and thrillingly comprehensive as all volumes of "The Years of Lyndon Johnson" combined. We promise we won't build any highways through the cake—but just to honor Robert Moses, maybe you should slice it with authoritative precision.

Your relentless dedication brought history alive for countless readers; here's hoping this year's achievements outshine even that legendary page count you've accumulated (no pressure!). Keep having epic adventures in libraries, archives—and coffee shops famously known to historians everywhere. Cheers—to a birthday worthy enough for its own compelling biography one day!