The Colour of Magic

While it is the first published Discworld novel, many readers find it establishes the world and characters differently from later books. Some suggest starting with other standalone novels like 'Guards! Guards!' or 'Mort' for a more representative introduction to the series' mature style.

Yes, 'The Colour of Magic' was adapted into a two-part television film in 2008, which also incorporated elements from its direct sequel, 'The Light Fantastic'.

Published on 24 November 1983 by Colin Smythe. It launched a series that would reach 41 novels over 32 years.

The story of Rincewind and Twoflower continues directly into the next book, 'The Light Fantastic', which resolves the immediate plot threads introduced here.

No. Pratchett often recommended starting with Guards! Guards! (1989) or Mort (1987). The Colour of Magic is more episodic and experimental than the series at its best.

Octarine — the eighth colour of the rainbow, visible only to wizards. It is described as a sort of greenish-yellow purple.

Primarily Robert E. Howard's Conan stories, Fritz Leiber's Lankhmar series, Anne McCaffrey's Dragonriders of Pern, and the conventions of sword-and-sorcery fiction generally.

Yes — Rincewind and Twoflower fall off the edge of the world. The sequel The Light Fantastic (1986) resolves this immediately. These two books are the only true duology in the Discworld series.