Biblios has such a simple mechanic but man it can leave with you a lot of tough decisions; is this the best card I will draw- Do I take it- Do I put it in the auction pile- Do I put it in the public space- Effectively you know ALMOST every pertinent detail in the game, minus the removed cards, but the draw will curve your optimal strategy but even if that doesn't pan out, you can manipulate the end scoring. So simple but so clever!
I am not usually one for auction games but this has almost more of a betting feel to it, but you better not get caught without the gold to back up your lies!
Biblios hits a similar spot as Sea of Clouds with a greater degree of control; while it may not be as exciting it is definitely more strategic with less take that.
With all that said this is quite a relaxing game to play, it's not a brain-burner, there's very little conflict but it will definitely not lull you into complacency or boredom.