I love Wen Spencer's work. This is one of very, very few examples I can think of where a couple kicks ass (together and separately) and both viewpoints manage to keep the reader's interest. Tinker and Wolf both fight to protect people in their own ways, and the characterization of even more minor characters is simply stellar. I also love the magic and technology aspect of these books. If you love a mixture of science fiction and fantasy, this book is definitely for you. But read Tinker first.
I should note that I actually have the omnibus that contains both [b:Tinker|47241|Tinker (Elfhome, #1)|Wen Spencer|https://d.gr-assets.com/books/1326314596s/47241.jpg|1105908] and [b:Wolf Who Rules|544237|Wolf Who Rules (Elfhome, #2)|Wen Spencer|https://d.gr-assets.com/books/1389956942s/544237.jpg|1105907], but I just now got around to reading this half.