Hello friend, It's a good idea to offer them to a quality thrift store (free of course) with the understanding of what they are and why they are helpful books.
Otherwise if they are recently published books you might consider putting them on Ebay to get a donation for the church or offer them online free at a local message board specifically for a beginning Pastor. (I like this best)
If you feel you need more suggestions please let me know what church this is and where and I will work to help you.
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Thankyou & God Bless!

