The Codex includes dozens of pictures of the uniforms and heraldry of the Space Marines, 360 degree miniatures galleries, a searchable glossary so you can find just the right unit or page instantly, up-to-date rules for weapons and wargear, the full rules and background for the brand new Stormtalon Gunship, and plenty more besides. It now weighs in at a mighty 324 pages of pictures, background, artwork and rules.
Bearing in mind how different this makes the digital version to the paper version, I thought it would be a good idea to have a look at it and see how it works. The first thing you notice is that the Codex is split up into sections. So there’s a section on the history of the Space Marines, a section on the composition of a Space Marine Company, the bestiary section, the miniatures gallery, and so on. Each of them are clearly labelled, so navigating them is as simple as poking the screen with your finger (you can probably tell I’m about as technologically adept as an Ork).