Print Warwick’s calls itself the oldest bookstore in America continuously owned and operated by the same family. This is its 125th year in business, roughly the past 70 of them in a building on Girard Avenue in La Jolla. A couple of months ago, fourth-generation owner Nancy Warwick got unexpected news that made her wonder how much longer the store would exist. Her longtime landlord had received an unsolicited $8.3 million bid — all cash — to buy the building. The landlord had accepted. Warwick, who had been negotiating a new lease, was given 15 days to beat the offer or face an uncertain future with a new landlord.