When we used to be able to purchase parts of books it worked well for me becaue I didn't want to have an abundance of spells or magic items (core spells and items were enough) that could take the creativity out of some challenges, so I just purchased the races, subclasses and some backgrounds.
Is there anyway to purchase a book (e.g.Humblewood Campaign Setting and only use (or content share) parts of it?
No. If you own the book, you own everything. Content sharing only prevents people from reading it in compendium form, they still have access to it in character creation form and from within the character creation suite.
When we used to be able to purchase parts of books it worked well for me becaue I didn't want to have an abundance of spells or magic items (core spells and items were enough) that could take the creativity out of some challenges, so I just purchased the races, subclasses and some backgrounds.
Is there anyway to purchase a book (e.g.Humblewood Campaign Setting and only use (or content share) parts of it?
No. If you own the book, you own everything. Content sharing only prevents people from reading it in compendium form, they still have access to it in character creation form and from within the character creation suite.
Specifically even when you could buy things piecemeal, the 3rd party content wasn't included in that.