Quicksilver is a historical novel by Neal Stephenson, published in 2003. It is the first volume of The Baroque Cycle, his late Baroque historical fiction series, succeeded by The Confusion and The System of the World (both published in 2004). Quicksilver won the Arthur C. Clarke Award and was nominated for the Locus Award in 2004. Stephenson organized the structure of Quicksilver such that chapters have been incorporated into three internal books titled "Quicksilver", "The King of the Vagabonds", and "Odalisque". In 2006, each internal book was released in separate paperback editions, to make the 900 pages more approachable for readers. These internal books were originally independent novels within the greater cycle during composition.
The books are mostly set in late 17th century England, France, and the United Provinces, though the first book includes a frame story set in early 18th century Massachusetts. The novel Quicksilver is written in various narrative styles, such as theatrical staging and epistolary, and follows a large group of characters. Stephenson researched the period, placing events and historical themes important to the scholarship throughout the novel.