The author was clearly inspired by the Isakai genre. I've read my fair share in Japanese and Korean media, but despite the genre's potential I've always found every iteration of it a bit lacking. A Western take on it's tropes could be refreshing, but if someone gets this genre to work for me it isn't this book.
So, I like Isakai in theory, I love Steampunk, attractive man on the cover, where could you go wrong? Well, our main protagonist is Ripley, who more commonly goes by his nickname Rip - which was given to him in his world because he was so, well, ripped. Maybe this wouldn't have been so cringe if Rip's interactions with every women in this book weren't so: Clueless-gentleman-turns-every-female-character-into-love-sick-fool-due-to-abs (the vampires were an insult to modern literature - they couldn't have been more cartoonishly seductive).
How Rip gets into the other world is acceptable given that there's a certain amount of suspension of disbelief one must have for any fantasy. Once there however, our all too accepting protag meets an all too accepting group of friends who hold valued positions in the Adventure's Guild (another trope I'm not particularly fond of). Rip learns a little about this new world from them, is easily accepted by the governing body, and learns all the rest he needs to know by reading books in his host's library.
That's it - that's all Rip has to do to navigate this new world. To me, one of the most interesting aspects of the Isakai genre - of going to another world - is the challenge of adapting to a whole new reality. But for some reason, this is where Isakai's often fail. This is why I've yet to read one that actually does it for me. Everything's too easy. There's no satisfying conflict. There's no language to learn, struggle with customs, non-hilarious misunderstandings, or incapability to fit in. It's always the same tired tropes.
His host, of course, is the main love interest, and her classification is "spy" - although I can't think of a single spy-like thing she does in this book. Naturally, Rip gets multiple classes - which is unique. That's to be expected, but I didn't really understand the power system well enough for me to be excited that Rip was overpowered.
The plot was serviceable, although I had questions there too - some which likely have answers in future books. I don't know if I enjoyed this one enough to read more though. The writing and characters were a bit too juvenile for my tastes. It wasn't an awful book, but I feel like it really squandered it's potential with flat characters, even shallower 'villians,' and overly simplistic writing.