The Zen of Quakerism (2016)

That's an interesting parallel. I'll admit, I know almost nothing about Quakers and Quakerism.

They're historically very interesting but you have to be careful about what you understand about contemporary quakers based on reading on the internet. Their traditions & cultural impact are attractive to a lot of people, who then write about it.

But quakerism as a living religion is extremely small and quite diverse for its tiny size, and groups practicing the traditional silent worship are a small minority even within that. The majority of living quakers experience a religion much closer to the main stream of evangelical christianity than you will expect from reading about it online. IIRC something like half of quakers are african.