A Calculus of Angels is an alternate history and fantasy novel by American writer Gregory Keyes, the second book in The Age of Unreason series.[1][2] It was initially published by Del Rey on March 30, 1999. A follow-up to Newton's Cannon, the book is set in 1722 and continues the alternate history where Isaac Newton discovers that alchemy works, and a powerful science is built upon it.

A Calculus of Angels
AuthorGregory Keyes
Cover artistTherese Nielsen
LanguageEnglish
SeriesThe Age of Unreason
GenreAlternate history, fantasy
PublisherDel Rey
Publication date
March 30, 1999
Publication placeUnited States
Media typePrint (Paperback)
Pages406
ISBN978-0-345-40607-1
OCLC39695456
813/.54 21
LC ClassPS3561.E79 C35 1999
Preceded byNewton's Cannon 
Followed byEmpire of Unreason 

References

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Sources

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  • "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.