''A Calculus of Angels'' is an

alternate history Alternate history (also referred to as alternative history, allohistory, althist, or simply A.H.) is a subgenre of speculative fiction in which one or more historical events have occurred but are resolved differently than in actual history. As ...

and

fantasy novel Fantasy literature is literature set in an imaginary universe, often but not always without any locations, events, or people from the real world. magic (paranormal), Magic, the supernatural and Legendary creature, magical creatures are common i ...

by American writer

Gregory Keyes Gregory Keyes (born April 11, 1963) is an American writer of science fiction and fantasy who has written both original and media-related novels under both the names J. Gregory Keyes and Greg Keyes. Early life Keyes was born in Meridian, Mississ ...

, the second book in ''

The Age of Unreason ''The Age of Unreason'' is a series of four novels written by Gregory Keyes: * '' Newton's Cannon'' (1998), * '' A Calculus of Angels'' (1999), * '' Empire of Unreason'' (2000), * '' The Shadows of God'' (2001), Its title is a reference to ...

'' series. It was initially published by Del Rey on March 30, 1999. A follow-up to ''

Newton's Cannon ''Newton's Cannon'' (1998) is a science fantasy novel by American writer Gregory Keyes, the first book in his '' The Age of Unreason'' series. The protagonist for the novel is Benjamin Franklin Benjamin Franklin (April 17, 1790) was an ...

'', the book is set in 1722 and continues the alternate history where

Isaac Newton Sir Isaac Newton () was an English polymath active as a mathematician, physicist, astronomer, alchemist, theologian, and author. Newton was a key figure in the Scientific Revolution and the Age of Enlightenment, Enlightenment that followed ...

discovers that

alchemy Alchemy (from the Arabic word , ) is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practised in China, India, the Muslim world, and Europe. In its Western form, alchemy is first ...

works, and a powerful science is built upon it.

References

External links

Sources

* "A Calculus of Angels (Book)." Publishers Weekly 246.12 (22 March 1999): 74. * Green, Roland. "Adult books: Fiction." Booklist 95.16 (15 April 1999): 1518. * Cassada, Jackie, and Barbara Hoffert. "Book Reviews: Fiction." Library Journal 124.7 (15 April 1999): 148. * Vretos, Linda A., and Trevelyn E. Jones. "Adult/Young Adult: Fiction." School Library Journal 46.1 (January 2000): 156. 1999 American novels 1999 science fiction novels 1999 fantasy novels American steampunk novels American alternate history novels Science fantasy novels Novels by J. Gregory Keyes Fiction set in 1722 Del Rey books {{1990s-ah-novel-stub