16 A series of books and written articles in the field of Christianity; A series of books, written articles, handouts and worksheets in the field of Christianity; Books in the field of Christianity; Printed matter, namely, paper signs, books, manuals, curriculum, newsletters, informational cards and brochures in the field of Christianity; Printed pamphlets, brochures, manuals, books, booklets, leaflets, flyers, informational sheets and newsletters, adhesive backed stickers, and kits comprising one or more of the foregoing materials in the field of Christianity