John Holbrook first meets Kit aboard the ship, the Dolphin, on their way to Wethersfield. His plan is to study theology and medicine under the well-known Reverend Gershom Bulkely. Eventually he would like to serve a small parish of his own. John is a gentle soul and an important character in “The Witch of Blackbird Pond.” The arrival of John and Kit changes the relationship dynamics of several young people (Judith, Mercy and William). As the story progresses, John finds the strength to speak up for himself and stand up for what he believes.
John Holbrook is a reverend-in-training. He "has come to Wethersfield to study theology with the Reverend Dr. Gersholm Bulkeley, a real historical personage." He is probably in his late teens.