Invisible Ink: Bible "New Testament" & "Old Testament" Yes & Know Trivia & Game Books Gift Set Bundle (2 Pack) Both "The New Testament" & "The Old Testament" Invisible Ink: Yes & Know Books Included for Hours of Fun! Use your Invisible Ink pen to reveal answers to trivia questions and fun activities about the Bible. 96 Pages of Fun! (48 pages in each set) Test your Bible knowledge! Ages 7+