The Briar King (Kingdoms of Thorn and Bone)
Greg Keyes
Tower of Dawn
Sarah J. Maas
Throne of Glass (6)
On a Pale Horse
Piers Anthony
Incarnations of Immortality (1)
Wielding a Red Sword
Incarnations of Immortality (4)
History of Mathematics, Volume 2
David Eugene Smith
History of Mathematics, Volume 1