Total Number of Books: 3,172
Ugly Love
Ultimate Ocean Rumble
Ultimate Reptile Rumble (Who Would Win?)
Ultimate Shark Rumble (Who Would Win?)
Ultraviolet (Ultraviolet #1)
Una arruga en el tiempo
Unashamed
Unbound: A Novel in Verse
Unbreakable: My Story, My Way
Unbroken Bonds (The Bonds that Tie Book 6)
Unchanged (Unremembered, #3)
Underground America
Undertale: Surviving the Underground
Underworld (Abandon #2)
UnDivided (Unwind Dystology Book 4)
Unicorn Bowling (Phoebe and Her Unicorn Series Book 9)
Unicorn Crossing (Phoebe and Her Unicorn Series Book 5)
Unicorn Famous (Phoebe and Her Unicorn Series Book 13)