I would recommend _The Hitchhiker's Guide to the Galaxy_ by Douglas Adams _Time And Stars_ by Poul Anderson _Fantastic Voyage_ by Isaac Asimov The "Foundation" trilogy by Isaac Asimov _The Caves of Steel_ by Isaac Asimov _I, Robot_ by Isaac Asimov _The Player of Games_ by Iain Banks _The Demolished Man_ by Alfred Bester _Brightness Reef_ by David Brin _Infinity's Shore_ by David Brin _Magic Kingdom, For Sale.. Sold!_ by Terry Brooks _Tangle Box_ by Terry Brooks _Yendi_ by Steven Brust _The Phoenix Guards_ by Steven Brust _Brothers in Arms_ by Lois McMaster Bujold _Mirror Dance_ by Lois McMaster Bujold _Cetaganda_ by Lois McMaster Bujold _A Civil Campaign_ by Lois McMaster Bujold _The Curse of Chalion_ by Lois McMaster Bujold _Ender's Game_ by Orson Scott Card _Lest Darkness Fall_ by L. Sprague de Camp _The Dragon Never Sleeps_ by Glen Cook The Annals of the Black Company by Glen Cook _Do Androids Dream of Electric Sheep?_ by Philip K. Dick The "Gap" cycle by Stephen Donaldson _Axiomatic_ by Greg Egan _Neverwhere_ by Neil Gaiman _A Wizard of Earthsea_ by Ursula le Guin _The Tombs of Atuan_ by Ursula le Guin The Night's Dawn Trilogy by Peter F. Hamilton _Tuf Voyaging_ by George R. Martin _Dragonflight_ by Anne McCaffrey _The Last Dancer_ by Daniel Keys Moran _The Long Run_ by Daniel Keys Moran _The Mote in God's Eye_ by Larry Niven/Jerry Pournelle _Protector_ by Larry Niven _The Anubis Gates_ by Tim Powers _On Stranger Tides_ by Tim Powers _Santiago_ by Mike Resnick The Harry Potter Series by J.K. Rowling _With a Strange Device_ by Eric Frank Russell The "Lensman" Series by E.E.'Doc' Smith _The Green Pearl_ by Jack Vance _The Peace War_ by Vernor Vinge _Marooned in Realtime_ by Vernor Vinge _A Fire Upon the Deep_ by Vernor Vinge