Okay, trying to piece together the Riddick reading order is a bit of a deep dive because the continuity weaves through movies, novelizations, and original novels. The pure book sequence, focusing on prose stories, is what you want.
First, you'd start with 'The Chronicles of Riddick: Dark Fury'—it's a bridge novel between 'Pitch Black' and 'The Chronicles of Riddick' movie. After that, move on to 'The Chronicles of Riddick' novelization by Alan Dean Foster, which expands on the film. Then you hit 'Riddick: Into the Dark' which is the novelization of 'Riddick' from 2013.
Now, there are also the 'Riddick' comics and some video game lore, but for prose, that's the core movie-tie-in trilogy. A lot of fans recommend watching the films first, though, as the books often assume you've seen them. I got lost once trying to read 'Into the Dark' without the movie context—the descriptions of the creatures didn't click until I saw them on screen.
For a newcomer, it's a weird case where the reading order mirrors release order, but the experience is better if you treat the books as companions, not the primary source material. The later novel 'The Wild Hunt: Dawn of the Necromancer' is a different beast altogether, set in a different universe, so most people skip it for Riddick lore.
Honestly, the whole thing feels less like a series and more like licensed expansions; you're not missing a huge overarching book-only plot. The correct sequence is short and directly tied to the films.