Writing on the subject of exploring how to live doesn’t preclude setting and enforcing healthy boundaries. If anything, it seems to me he’s responding appropriately without being excessively inflammatory.
seems inflammatory to me; someone selling an e-book edition is certainly violating his rights, the purchaser is probably not.
Are they civily or crimimaly liable? Probably not, but IANAL. Bigger pockets would say sue the store and the publisher, not the clients.