I really enjoyed Ruby Red (which is an Addicted to YA January 2014 Book of the Month). For current young adult fiction, it seems to feel different. This could be because it was originally written in German. Regardless, it lacks that sweaty, gritty sheen of many American YA reads and feels almost...wholesome? If one can be wholesome while running swords through people... 
 Time-travel, ghosts, period costumes, and lots of Googling...with British accents translated from German, woo! 
 The plot moves quickly, but at the same time seems not to go far into the overall story arc. Therefore, reading and liking this first book seems to necessitate a commitment to the whole series. 
 My only issue is the chronograph technology -- say what?? I'm hoping all that will make more sense in the next book.