Hi Mark ,, The Designers manual is a ( Manual ) treat it like that and refer to it when you need specifics and ideas. Bill's Permaculture Two is drylands oriented ,, solutions and practices for drylands. I recommend this book by Gary Paul Nabhan : Growing Food in a Hotter, Drier Land: Lessons from Desert Farmers on Adapting to Climate Uncertainty. https://www.amazon.com/Growing-Food-Hotter-Drier-Land/dp/1603584536 Its not permaculture but its very handy and full of practical solutions for drylands farming. Best of luck in Morocco , hope to visit you soon and give you a hand !