I have updated the Islands of the Caliph Instruction Manual.
It is mostly the same but the table of contents includes two new sections.
Acts of Worship
Experience, Levels and Stats
These are new sections I have added to towards the end of the manual which describe in more detail how these game mechanics actually work. I tried to included enough information in the game itself to allow the game to be played without reference to the manual, but this just gives a basic overview of how these things work.
I hope it helps clarify things for players!