Here's some eBooks from the publisher W. W. Norton & Company that are listed at $1.2-$3 (Mostly US Kindle, but I've added Nook links when available:
Non-fiction:
The Earth Moves: Galileo and the Roman Inquisition by Dan Hofstadter for $1.68 (*B&N has it for $9.99)
Natural Acts: A Sidelong View of Science and Nature by David Quammen for $1.46 (also at
B&N)
A Force of Nature: The Frontier Genius of Ernest Rutherford (Great Discoveries Series) by Richard Reeves for $2.08 (also at
B&N)
Judas: A Biography by Susan Gubar for $2.20 (also at
B&N)
Madre: Perilous Journeys with a Spanish Noun by Liza Bakewell for $2.90 (*B&N has it for $14.37)
Fiction:
Requiem, Mass.: A Novel by John Dufresne for $1.17 (*B&N has it for $14.97) - speculative historical fiction
Body of Lies: A Novel by David Ignatius for $1.24 (also at
B&N) - spy thriller
Johnny One-Eye: A Tale of the American Revolution by Jerome Charyn for $1.40 (also at
B&N) - historical fiction
Coventry: A Novel by Helen Humphreys for $1.91 (also at
B&N) - historical fiction
The Great Perhaps: A Novel by Joe Meno $2.32 (also at
B&N) - family drama
The Age of Shiva: A Novel by Manil Suri for $2.56 (*B&N has it for $9.99) - Literary fiction
What Can I Do When Everything's On Fire?: A Novel by António Lobo Antunes (translated by Gregory Rabassa) for $2.71 (*B&N has it for $9.99) - Literary fiction