Books Newsletter New tomes on Hans Holbein’s portraits, photographer Jan Staller’s studies of Manhattan construction sites, and more. Alison Knowles is often regarded as the "first woman" of Fluxus, the intrepid group that took the piss out of art itself. Six months after her death, Lauren Moya Ford examines the only book dedicated to her work and life — the latter of which still remains shrouded in mystery, despite the author's best efforts. Ford considers one of the many questions that plague historians: Can we understand the work if we do not first understand the artist? More books to kick off May, which spiritually if not technically marks the start of summer, including Ed Simon on the qualities that set Hans Holbein's portraits apart and Melissa Holbrook Pierson on a photographer's engagement with the endless landscape of construction sites in Manhattan.…