&sq=Envato&lang=en&file=File:Necessity_(book_cover).jpg) Hardcover edition | |
| Author | Jo Walton |
|---|---|
| Series | Thessaly |
| Genre | fantasy / science fiction |
| Publisher | Tor Books |
Publication date | 2016 |
| Pages | 331 (hardcover) |
| ISBN | 978-0-7653-7902-3 |
| Preceded by | The Philosopher Kings |
Necessity is a fantasy/science fiction novel by the Welsh–Canadian author Jo Walton, published by Tor Books in 2016. It is the conclusion of the Thessaly trilogy and the sequel to The Just City and The Philosopher Kings, which were both published in 2015.