Right, I’ve managed to work out the ten clues, it uses a substitution code but clue six must have a few typo’s. I worked out what clue one means, about keeping it northfacing. You have to use the suns on the ISIS as a guide. If you are reading this and want some help on the clues, please email me as I dont want to post them here.

I found a pic of the key inside. Not sure if I’ll manage to see one in real life…