Original: The guide describes and summarizes all of the key events that occur in Resident Evil Zero, Resident Evil, Resident Evil 2, Resident Evil 3: Nemesis, and Resident Evil Code: Veronica.
Simplified: The series had five more sequels - Resident Evil 2, Resident Evil 3: Nemesis, Resident Evil CODE: Veronica, Resident Evil 0, and Resident Evil 4.