Hi YehudahTzvi and Syag Lchochma.
It’s difficult to say without seeing it, but I know that the Pesach book by Rabbi Blumenkrantz has a page at the front/back respectfully asking that it be treated as Shaimos and not thrown out. They even have an address to mail it to if you don’t have Shaimos deposits in your area. Now this book that I speak of does not appear to have Shem HaShem or much writing in Lashon HaKodesh.
Breslov Pamphlets usually have Tikkun HaKlali (the 10 Tehillim) printed in the back, so I think that definitely has to be treated as Shaimos.
Literatue that has Shem HaShem (even not Lishmah) has to be buried.
Most Shuls in my area have Shaimos rooms that allow people to drop off their stuff and Erev Pesach, a truck comes by to collect what people have.
Concerning books written by Reform, etc… (pure English) — it may be possible to donate them, make it Hefker (leave it out on your curb) in a box clearly marked, etc… I don’t know without seeing the contents, etc…
Hope this helps.