If you have a (too) well-stocked home library of good Christian books, but you still want to keep stocking it, start passing along your already-read titles to a local Little Free Library, which invites users to “leave a book; take a book.” What a great opportunity to share your favorite Christian authors with the neighborhood!
And if you want to be subversive, the books you take when you leave a book can be the kind that you don’t want your neighbors to read. Take out the trash and leave them the treasure instead. It’s a service too, to put garbage into the garbage can. For instance, in my neighborhood’s Little Free Library, I gave up a copy of A.W. Tozer’s God and Men, in exchange for the bigger, but definitely not better, The Origin of Species – Charles Darwin’s kickstarter for the evolution movement – and dropped the latter into my little free wastebasket.
On the other hand, more positively, to be more clearly salt and light in your neighborhood, include a bookmark in each book you donate, with suitable contact information and an invitation to email you, or, even better, to talk with you over coffee, about the book.
If you want to start your own Little Free Library, check out LittleFreeLibrary.org.