Chef Thomas Keller of French Laundry and Per Se fame is swinging through San Diego to sign copies of his latest cookbook, “ad hoc at home: family-style recipes” at noon May 13 at Williams-Sonoma in University Towne Center, 4417 La Jolla Village Drive.Keller will only personalize copies of “ad hoc” that have been purchased at Williams-Sonoma. To pre-order a book, call the store at (858) 597-0611.