I did want there to be more mystery in Tiberium; Imriel ends up being very preoccupied with matters other than the city itself and its culture, and I felt like we didn't see as much of the destination of this book as we did of Menekhet, Jebe-Barkal, Saba, Skaldi, Alba, La Serenissima, and even Drujan and Khebbel-im-Akkad in previous books.