If you read TCOM1 and thought it was a complete and satisfying story don't read TCOM2. The story of Sam and the colonists continues. Sam finds that all his memories are suspect. Many of the characters from TCOM1 are in the book, as AIs. Some are good people; some are not. The humans eventually do arrive on Mars, and in several forms. The RNF (rich and famous) are fleeing an overheated Earth and bringing all their baggage with them. What could possibly go wrong, eh?
If you found the many acronyms confusing you can get the Glossary of Terms from my Blog at colonisationofmars.com