With the success of the original newsletter, the Oppenheims published their first book (The Best Toys, Books, Videos and Music for Kids) together with HarperCollins in 1994. They formed their own publishing company in 1998 and began publishing what would become their annual Oppenheim Toy Portfolio guide book. The company also publishes the Read It! Play It! series on childhood literacy.Oppenheim, Joanne and Stephanie. The Best Toys, Books & Videos for Kids - "Introduction". HarperCollins. Pg.ix. 1993.
