Thanks for all the help and guidance.
I would say Wolf you're going to have to get more specific. Most books are not really harmful in and of themselves, neither are most images.. even Hindu ones as far as I've noticed. If you use them as just decoration, that's one thing. However if you're chanting at them, then that's quite another.. -- no need to "chant" for Orthodox Christians. At least chanting of mantras anyways..
The only thing that can harm you about a book is if you're not absolutely certain what the Orthodox Church teaches, and thereby you might end up getting very confused and lost. But other then that, you should be okay..
Most of the books are academic books on Witchcraft and Ancient Religion which may come in handy someday, but I have a copy of the Satanic bible and some other books on practicing witchcraft. Also Tarot cards, rune stones, incense, images of deities and hand copied seals and sigils which have all been consecrated or "blessed" and used at some point.
My Orthodox Priest recommended that I destroy anything that was not Orthodox since I had a nine year old son who was very inquisitive.
This is also something that has been on my mind - in the event that I do get rid of all this stuff I certainly wouldn't feel comfortable selling or giving it away, in case it dragged others into the occult. But book burning seems such an extreme thing to do.
On the topic of religious books though - I have many non-christian religious texts - several Hindu texts, some books of Buddhism, several copies of the Quran. I trust that this kind of thing would not be as damaging?