Flight of the Heron was written by DK Broster in the 20's it's the tale of the strange relationship that develops between a Highland aristocrat fighting for Bonnie Prince Charlie and an English major during the 45 rebellion. There's a strong mystic aspect; a prophecy - one of them is going to die, but which one..,? It's buddy fiction at its best; deliciously, quietly slashy and the angst is extraordinary. If you've not read it I can't rec it too highly.

Jim n Blair wrangling animals in Africa...? Hmmm... can I reserve judgement on that? *g*

I'm massively (but quietly, there are others in the room (o:) squeeful that you like Rainbows; hopefully the first sequel should be out fairly soon (I'm wibbling about it a bit, because it's quite different from CR, slash of course, but much darker in tone and about to get darker still in part 3).