"The Imitation of Christ" by Thomas à Kempis is a Christian devotional book composed between 1418-1427. Divided into four books of spiritual instruction, this medieval text guides readers toward interior spiritual life and withdrawal from worldly concerns. Emphasizing devotion to the Eucharist and practices from the Devotio Moderna movement, it offers detailed counsels on living a contemplative Christian life. After the Bible, it became the most widely read devotional work in Christianity, with over 745 editions printed before 1650.