These are the last books from that private collector sale.
Haldeman, Joe. Worlds Enough and Time. Morrow, 1992. First edition hardback, a Fine copy in a Fine dust jacket, signed by Haldeman. Third book in the Worlds trilogy.

Selznick, Brian. The Invention of Hugo Cabret. Scholastic Press, 2007. First edition hardback, a Fine copy in a Fine dust jacket. Illustrated young adult novel. Winner of the 2008 Caldecott Medal and basis of the 2011 film Hugo, which I also enjoyed.

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.