Eddis, Attolia, Sounis

Of Sutcliffe's other books, The Silver Branch is the most closely tied to The Eagle of the Ninth since it also features the eagle standard, and it's one of my favorite of her books. There's a wonderfully mordant maiden aunt at the end, and lots of spying and excitement throughout. (It's also one of the few that ends happily, which is probably one reason why I like it so much. Books need happy endings.) My other favorite is Blood Feud (https://en.wikipedia.org/wiki/Blood_Feud_(novel)), which is another trekking book like The Eagle and TaT, with a route that covers territory from England and Ireland through Eastern Europe down to Constantinople, and has politics, fighting, friendship, and romance. I liked Bonnie Dundee, too, though it was rather depressing and it seemed like everyone died; it's set in Scotland during the religious-political wars of the 1800s.