Is there a reason you cannot mount it on the wall just above the bookshelf? One of the things I really like about the Unifi gear is how just small and inconspicuous it is. It really helped sell it when I suggested it to my mom and other family members. Mounted most of the APs for them on the ceilings, but a few of them are wall mounted as well. The ceiling ones look nicer than any smoke detecter I have ever seen.
So I actually really like the UniFi gear for that when compared to some crazy Linksys gamer router that just looks... so over done.