I'm sorry, I can't do top 11 novels, just can't. I was able to come up top 11 authors whose work I've read or re-read in the recent years. Listing by author (in alphabetical order) with top picks from their novels. As noted by others, this list is subject to change without notice, with mood or with subsequent reading.
- Orson Scott Card : Ender's Game / Speaker for the Dead
- Nelson DeMille : Cathedral
- Stephen Donaldson : Covenant Series / Gap Series
- Neil Gaiman : Stardust / The Graveyard Book / Neverwhere
- Robert Goddard : In Pale Battalions / Take No Farewell / Beyond Recall
- William Horwood : The Stonor Eagles / Skallagrigg
- John Irving : A Prayer for Owen Meany / Cider House Rules
- Richard North Patterson : Eyes of a Child / Protect and Defend / Balance of Power
- Terry Pratchett : The Bromeliad / Small Gods / Hogfather / Night Watch
- J.K.Rowling : Harry Potter - the lot
- J.R.R.Tolkien : The Lord of the Rings
And I can't leave without at least nodding at a few of the authors with works that got pushed of the list by insufficient room: Isaac Asmimov (Foundation), Stephen King (Stand/It/Deadzone), Larry Niven & Jerry Pournelle (The Mote in God's Eye). ... Oh, I'd better stop, I guess.
PS. FatDog:
Ringworld is by Larry Niven.