I purchased this book AFTER I tried creating my own mineral makeup. I originally bought all the ingredients from TKB and tried to formulate my own loose powder makeup. I wasted a good bit of my ingredients during these trials, it was too shear, too cakey, too brown, too this too that! Today I made (from her book) the base foundation for oily acne skin, the eggnog foundation color, a concealer, the minty green correcting powder and the finishing powder. Then gave it whirl on my face, and let me tell you, it covered beautifully and went like silk. I have very oily skin and end up getting little rivers of caked powder as the day goes on, so far after 4 hours, it still looks freshly applied. Her ingredients are top quality and I recommend purchasing this book if you are new to making mineral makeup. Tomorrow I’ll be making my blush!