So this was pretty big news.
For those who are confused about the casting changes a quick break down is Takeshi Kovacs was originally born from Asian and Slovak parents but the nature of this future is that people easily change bodies. In the first book he’s Caucasian, in the 2nd book he’s African, and in the final book he starts off in a synthetic body and then to an Asian one.
The 2nd book is called Broken Angels and its a totally different tone from Altered Carbon leaning much more into Military Sci-fi as there’s a war going on but it’s really a book about discovering… something truly alien and spectacular out in the middle of space. Like Aliens meets Annihilation. It’s a book most fans hated when it came out because of the tonal shift but if you can get past that it’s pretty fantastic.
Also if you didn’t care to much for the first season or those characters if things pan out how I think it will this will be an entirely new cast except for Quell.