3.5 stars but I'm giving it the benefit of the doubt and rounding up to 4. 
 The front cover of this book made me think of Indiana Jones and, if I'm honest, that (and the cheap price) is what motivated me to buy it. The story itself was sound with some very good world building. The story is for the most part set in Outer Mongolia in the late 19th century, which I don't know much about and as such I enjoyed the descriptions of the Mongolian steppes and the ways of life the natives enjoyed in that time period. The pace was good and served to keep me interested until the very end. 
 Now the bad. I didn't like the wet panties as of the end of chapter 2, when the characters didn't even know each other; I prefer a growing relationship to lust (and wet panties) at first sight. To her credit, the author did keep the characters from doing the dirty until much later in the book, though. 
 The bigger problem for me, which is probably just a personal annoyance, was how Huntley, male protagonist, spent a fortnight, if that, around the Mongol language without actually making any effort to learn it and then all of a sudden he's babbling off rather complicated and grammatically correct sentences, not to mention keeping up and on-going interpretation? That's not how language acquisition works and this really tempered my enjoyment of the last 60 - 70 pages of the book.