Roctogenarians is a collection of entertaining and unexpected profiles of these unretired titans--some long gone (a cancer-stricken Henri Matisse, who began work on his celebrated cut-outs when he could no longer paint), some [until recently] still living (the original EGOT, Rita Moreno). The amazing cast of characters also includes Mary Church Terrell, who at eighty-six helped lead sit-ins at segregated Washington, DC, lunch counters in the 1950s, and John Goodenough, who was more than good enough to score a Nobel Prize at ninety-seven for inventing the lithium-ion battery.      384 pages  hc