Ah, but Powells' sci-fi section is 4 ailes, 30 feet long by ten feet high, both sides. One author can only take up so much space.
Speaking of which, Powells itself is a full city block, 3 stories high, with a Technical Books annex filling another half block. I'm reading as fast as I can, but you'll have to cut me a bit of slack for not getting around to this particular author yet.
Any suggestions for a title I should start with?