And the most likely one (at least imo) would be to spread his ideas as far as possible. A book is a great medium to reach people who wouldn't otherwise actively

And the most likely one (at least imo) would be to spread his ideas as far as possible. A book is a great medium to reach people who wouldn't otherwise actively seek out information outside of their current scope, by making a stack of physical objects appear in their field of vision and inviting them to take notice.