I don’t have a lot more to say about Brother Assassin.
The book is well-paced, broken up into three sequential story segments. Normally time travel stories can pretty easily develop into something of a tangled clusterfark, but I found Saberhagen’s approach quite engaging. In each part, the berserkers adjust their strategy to affect history in a different way, with the human defenders scrambling to guess the nature and target of the attacks.
The protagonist is no John Carter or James Bond, but he’s interesting enough to carry the story, and at least he’s got an arch in a book that’s largely focused on something much grander than any single character.
More than anything, this series has really reinforced for me that once you start down this rabbit hole of exploring older SFF, you notice that the stuff you thought was really cool and unique…well, it may be cool, but it’s probably not as unique as you think.
Saberhagen’s Berserker books may not have been a direct influence upon some more modern scifi franchises, but if they weren’t then there are some amazing similarities.