Codex: Orks is a typical Codex for the tenth edition of Warhammer 40,000, including the lore and rules for the belligerent greenskins.
A lot of the lore in the background section has been taken from previous editions, but some of it has been rewritten, updated and added to a reasonable amount in some places. The background section includes three short narrative pieces and while the first is really just an way to introduce the various units and clans, the other two are quite entertaining, especially the one about a Big Mek trying to bring down a Chaos Knight.
The Showcase section of the book is reasonable, and the artwork is as good as it always is.
The rules section of the book contains all the usual tenth edition rules. The Combat Patrol section features the rules for the Beast Snagga’s Combat Patrol that seem reasonable, it is just a shame that the Beast Snaggas are probably my least favourite part of the Ork faction. The Detachments in the book are all reasonably good with basic hordes, Beast Snaggas, the Kult of Speed, green tide hordes, and Nob heavy hordes all catered for. The lack of a dakka horde detachment is a little disappointing, however, as that is my preferred style of Ork army. The Crusade rules that allow a player to build a Waaagh! seem to be a lot better than those from last edition that allowed players to collect scrap and has Warbosses to fighting for control of a Waaagh! The datasheets for the various Ork units are all standard for this edition.