This book combines fantasy, steampunk, adventure, thriller, comedy and drama, together with light hints of romance; The romance here is like it used to be in the tv show NCIS; there is the odd hint of it between the characters here and there, but it isn't the main focus of the plot. Just how I like my non-romance books - it doesn't overpower the plot, it is like a garnish that tops everything off.
Amaranthe is a woman struggling to get ahead in a mans world, but the author doesn't make her all "I'll do this all by myself and prove you all wrong", to the point of shooting herself in the foot. She actually makes for a very likeable heroine. She isn't a coward, but she doesn't wander around putting herself in a endless loop of dangerous situations and she knows when to back the hell away. She isn't anyone's doormat, but she realises that sometimes she'll be better off keeping silent. In other words she doesn't irritate me by being a dumb, horror movie-like bimbo, whilst still having vulnerabilities to go with her backbone.
I also really like that the author doesn't try to romantasise Sicarius, unlike so many other fantasy books these days. He is who he is and does what he does, and doesn't apologise for it or justify himself to anyone. In other words he is what I picture a assassin to be. The most believable borderline sociopathic alpha in a mainstream fantasy-with-a-touch-of-romance since Karen Marie Moning created Jericho Barrons.
I enjoyed the heck out of The Emperor's Edge - to the point of sitting up in bed into the small hours, as 'just one more chapter' lead to me reading half a dozen more. Then as soon as I finished the book, I went to my Kindle Store to buy the whole series.