For some reason I mostly recognize the higher numbers.

3 is Wizard's First Rule by Terry Goodkind
5 is Goblin Quest by Jim Hines
12 is Devlin's Luck by Patricia Bray
15 is His Majesty's Dragon by Naomi Novik
16 is yours, right? The Skewed Throne
17 is Ship of Magic by Robin Hobb
18 is The Eye of the World by Robert Jordan
20 is Name of the Wind by Patrick Rothfuss

And number 19 is really bugging me because I know I should know that one.