So this book is considerably less adventury than the previous two books in the series, but it's still a fun read. David is less alpha than the previous male leads, but he's certainly a good guy so definitely a nice romantic character. Annika is also less alpha than the previous female leads. She's in no way a fighter, but then neither is David. So you've got a scientist and an engineer romance, this means there's way less adventure (no zombies!) so the struggle they face is more about them thus making this a slightly more traditional romance. Still good, but much more toned down than the previous books. Also considerably less sexy time than the previous books, or at least it felt that way. This is pretty much because both of the main characters have little in the way of experience (first book: 1 lots, 1 none second book: both lots) so while this is appropriate for the characters, it makes for a much slower build up.