Jon Paul Buchmeyer learned plenty from Tyra Banks when he worked as her publicist during her book tour for “Inside Out.” “Chips with the fat substitute Olestra cause Tyra to have intestinal distress,” he writes in his memoir, “Alphabet City,” which chronicled his years working for Whoopi Goldberg, Vanessa Williams and Condé Nast Traveler. Buchmeyer also learned, “Tyra thinks white limos are tacky,” and to beware of fans who bring teddy bears to book signings — “Anyone that showed up at a book signing offering a stuffed animal probably needs a security escort.”