Cabinet of Wonders, by Marie Rutkoski
I'm excited to read the next installment of Petra's adventures! Having had a slight obsession with Peter Sis and his Prague-themed picture books, as well as Philip Pullman's fantastical worlds (think Clockwork, too!) I was totally sucked in. Characters are well fleshed out, and I am already invested in finding out where the story will go next . . .