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Being.smart Whatever you are doing is good but think about its practicality... If people are getting bored or not feeling sleepy, they'd pick up some magazine or short stories book. No one would think of picking up a new 900-page novel at 1 am. Only regular readers can continue with novels every night. Intermittent reading makes you lose track of the story and character history.
If you are doing it for show-off then you are doing it in a bad way. Keeping all the popular books (BTW, showing off popular books is too clichéd) in your library won't make your guests jump with sheer delight. They would say, "yeah, i've read it... heard about it, etc". If it's something rare or catchy, they'd surely pick it up and ask you about it.
I've seen books like "Who moved my cheese", "DaVinci Code", "Harry Potter series", etc. at many people's places and I never pick them up to take a look
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If there is some interesting new book then it definitely becomes a discussion point.
Also, there is no use displaying a book for which you have no explanation. What would you tell if someone asks you what's it about? Would you say, "well I bought it because member X suggested me on TE and except for the price, I don't know anything else about it!"
Just read up a bit about each book suggested by the members here. If you like it even a tiny bit, you can buy it.