Söderqvist has written three books on the Internet revolution, collectively known as The Futurica Trilogy, together with philosopher and lecturer Alexander Bard. Their first collaboration The Netocrats was originally released in Swedish in 2000, became available in English in 2003, and has since been translated to a further 16 languages with total worldwide sales exceeding 340,000 copies.
The second book The Global Empire was originally released in Swedish in 2003, while the third installment of the trilogy The Body Machines was originally published in Swedish in 2009. These latter two works were released in English in 2012, completing The Futurica Trilogy, in which the authors present their philosophical vision for a global and increasingly virtual society, as a consequence of the Internet revolution. Söderqvist and Bard have announced work on a forth book together, focusing on the metaphysics of the Internet age, to be released in the fall of 2014.
Söderqvist is known as a critic of laws regulating prostitution in Sweden and is one of the 15 founders of the Liberal Democratic Party of Sweden.
- "The Futurica Trilogy". Stockholm Text. 28 June 2012. Retrieved 6 November 2012.
- Bard, Alexander; Söderqvist, Jan (2002). Det globala imperiet: informationsålderns politiska filosofi [The Global Empire] (in Swedish). Stockholm: Bonnier Fakta. ISBN 91-85015-03-2.; reviewed in Ingdahl, Waldemar (2003). "Informationsålderns politiska filosofi" [Political Philosophy of the Information Age]. Svensk Tidskrift (in Swedish) (Stockholm: Nordstedts Tryckeri) (2). ISSN 0039-677X. OCLC 1586291. Archived from the original on 12 January 2010. Retrieved 12 January 2010. (This is a book review of Bard & Söderqvist, Det globala imperiet, 2002, ISBN 91-85015-03-2); bibliographic entries at LIBRIS No. 8814548 (WebCite 12 January 2010) and librarything.com (WebCite 12 January 2010)