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.

About Lawrence Person
Lawrence Person is a science fiction writer living in Austin, Texas. His short fiction has appeared in Asimov's, Analog, Postscripts, Jim Baen's Universe, Fear, and several anthologies. He also edits the Hugo-nominated SF critical magazine Nova Express, and runs the Turkey City Writer's Workshop. His non-fiction has appeared in National Review, Reason, Whole Earth Review, The Freeman, The World & I, Science Fiction Eye, The New York Review of Science Fiction, and Slashdot.org. He owns such a large library (mostly science fiction first editions) he had to buy a two-story house to put it in, and then adopted a golden retriever to drag him out of his house on a regular basis. He also makes a mean batch of salsa.