Recent monographs on Johannine signs tend to focus on a single sign. Other studies that examine multiple signs mainly focus on the first half of John's Gospel. In Christian circles, most preachers and believers remain preoccupied by the traditional view that John's Gospel contains only seven signs. However, what constitutes a sign for John, and how signs function to achieve the purpose of the Gospel (John 20:30-31) is far from settled. Three features of this book explore important clues for solving this puzzle: (1) a fresh hypothesis that Jesus's signs correspond to the four tabernacle signs (a pot of manna, Aaron's staff, the bronze altar cover, and the bronze serpent), which makes sense given the tabernacle/temple theme of John's Gospel; (2) a complete study that examines Johannine signs in the whole Gospel systematically to reveal how signs develop the book's purpose; and (3) an adaptation of a sociolinguistic theory to examine the corresponding texts of the Old Testament and New Testament in light of how language functions in a social event. The author will show how Jesus's signs fulfill the functions of the four tabernacle signs, and how Jesus's crucifixion is the "all-inclusive" sign in witnessing to his identity.