I'm a huge fan of BE and have read most of her work. I did enjoy Darkest Hour but I don't think it's her best book, I think her characterisation was better than it usually yes (they tend to be a bit two-dimensional) and as usual, the atmosphere was very evocative, but my favourites so far are House of Echoes (my first BE book), Midnight is a Lonely Place, and Hiding from the Light, and I also liked River of Destiny and Whispers In the Sand, and the short story collections are worth a read too.
I wasn't keen of Daughters of Fire, which is probably why I still haven't read Warrior's Princess, and I've still got Time's Legacy on the tbr pile too - I'm now worried about those dogs though! I do like the sound of it, as well as the setting.
