Found this at a Half Price Books in Houston over Thanksgiving:
(Dick, Philip K.) Williams, Paul. Only Apparently Real: The World of Philip K. Dick. Arbor House, 1986. First edition trade paperback original, a Near Fine+ copy with some non-breaking indentations on the cover, as the book were used underneath a piece of paper someone wrote or scribbled on, otherwise apparently unread. Signed by Williams (the signature matches those found online for the limited edition of Ubik: A Screenplay). The biography of Dick by his close friend and designated literary executor. Supplements a Fine unsigned copy. Bought for $3.98.
Tags: Books, Paul Williams, Philip K. Dick, reference works, Science Fiction, signed