Really outstanding ! The red hues of the castle, standing out from the grey-white background of the mountains, are of course immediately eye-catching and they give character aplenty to an already imposing structure. Your picture also brought about an added rush of nostalgia, since its landscape of jagged snowy peaks -- as well as, I guess, the name of that novel : The Horde... -- strongly reminded me of the art of Stephen Bradbury, first encountered on the covers of the Fire*Wolf series of gamebooks. (I've just checked them again and, let's face it, when looked at with a neutral eye, they do not amount to that much, and you are by far the better illustrator : still, childhood memories are childhood memories...) This is in any case a superb piece, full of atmosphere and detail, and with strong evocative power. Well done !