This is going to be a hard book to review and I suspect that the ratings will be all across the board. Some people are going to hate it, some like it, and many more will just be confused. I'm in the last camp, but despite being confused, I must say I liked and enjoyed this book.
The downside of An Evil Guest is that this book is extremely disjointed, not very clear, and parts seem missing. I truly wondered as I was reading this if Mr. Wolfe didn't thrash this out while on some very interesting medications. The upside is that the book grabbed my attention and I enjoyed reading it despite what I might normally call serious flaws. So this is hard to explain. I'm not sure I understood the story, I'm not sure who the evil guest was, I'm not sure what the heck Wolderan had to do with anything, and despite being set 100 years in the future I could detect no trace of that in the book other than that some people had personal spaceships. Other than that, and they didn't have any bearing on the plot, it could have been 1999. In fact, I am not even sure this book has a plot. The musings in the early part of the book regarding good and evil never bear fruit, fun forays into sentient mountains and werewolves never seem to amount to anything and the two Alpha males, Gideon and Reis, never deliver on their promise. The dialogue left me so confused that at many points in the book I had to go back and re-read a sequence three or four times to understand it. It often felt like reading a play without any of the visual cues, mostly because Wolfe didn't add much in the way of descriptions throughout the book. Ready to run away? Not so fast. Somehow I enjoyed this book. I've read several books in the last month that I didn't enjoy at all, but I actually enjoyed this one and even the complete lack of a comprehensible ending didn't take the blush off the rose.
So what is about this book? It reminded me of nothing so much as if Hunter S. Thompson, whacked out on good acid and bad whiskey during a broadway show, started writing a science fiction book right in the theater and then finished it over the course of a jittery and spastic night. The book is extremely disorienting, but it is disorienting in a recognizable way. It may not make a ton of sense, but think about a long and interesting dream you may have had once. This book comes as close as anything I've ever read to being like a dream. It doesn't have a lot of logic, things show up which have no relevance, characters change and morph over time for no particular reason, the story changes and goes to bizarre places and the end is like waking up to a different reality. Which is always disorienting. Nominally this book is about an actress, Cassie Casey, who does theatre and gets caught up in the maneuverings of two wealthy, powerful, interesting and dangerous males who are both being hunted by the US government. Kind of. That's as close to a plot as you're going to get and the story wanders away from it frequently.
So, if you have had fabulous, disjointed random dreams before, I think you may like this book. That's exactly what the reading experience is like. I enjoyed this book despite it ignoring every convention out there, but I think to enjoy this one you just have to let go and flow with the book. This is very odd stuff, but if you don't fight it you may enjoy it.