I haven't read either book but this topic interests me also.

Could say lots about overdiagnosis and overmedication but I'll skip my soap box tonight.
2/c-3a Coarse hair med. density.
Protein sensitive but can use occasionally
Highly porous. Color over grey.
I love all the Curl Junkie products and use CJ CCCL as my main styler. Still hoping for 2nd day hair....
Every day is a gift