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Mainspring
Cover of 2007 First Edition
Author	Jay Lake
Cover artist	Stephane Martiniere
Country	United States
Language	English
Genre	Science fiction
Publisher	Tor Books
Publication date	June 2007
Media type	Print (Hardbound)
Pages	320 pp
ISBN	0-7653-1708-7
OCLC	85243813
Dewey Decimal	813/.6 22
LC Class	PS3612.A519 M35 2007
Followed by	Escapement

Mainspring is the third novel from writer Jay Lake. It is a clockpunk science fiction novel.

This novel is followed by the 2008 sequel Escapement and the 2010 sequel Pinion.

Plot summary

Mainspring is the story of a young clockmaker's apprentice, who is visited by the Archangel Gabriel. He is told that he must take the Key Perilous and rewind the mainspring of the Earth. It is running down, and disaster to the planet will ensue if it's not rewound. From innocence and ignorance to power and self-knowledge, the young man will make the long and perilous journey to the South Polar Axis, to fulfill the commandment of his God.