It is implied Amos is Eric’s brother and that the woman who died and he went to see the guy about might have been his mother. Alex visiting the lecture hall then taking the aide out to dinner which was actually a setup is also not in the book. Timeline wise, Amos should be visiting Clarrissa in jail when the asteroids start to fall. The characters interacting with Avasarala and that part of the story don’t relate to events as depicted in the book.
The brother comment was figurative, as they grew up on the streets together, never took it as literal, same as Lydia, she looked out for him, he just saw her as a mother figure. Alex does approach old Mars Navy contacts in the book, just the location has been changed. Amos is about to visit Clarrisa I assume based on his call to Chrissy
at the end of episode 2. Granted Avasarala stuff isn't in the books but don't believe you have chapters from her perspective in those books so that has to be creative licence.
![Big Grin :D :D](/styles/default/xenforo/vbSmilies/Normal/biggrin.gif)
Agree it's not as tight as in the books but it never was.