This research is intended to develop an English textbook integrated with Islamic values in Islamic boarding schools to present more relevant material in the learning process to help the students learn meaningfully, achieve their learning goals effectively, and strengthen their Islamic characters. The researcher implemented the RnD method with the ADDIE model as the instructional design framework. Initially, needs analysis and interviews were conducted for 20 participants from grade XI of Mahyajatul Qurra’ Islamic Boarding School Takalar, revealing students’ target and learning needs. In the design phase, the researcher created a syllabus covering the essential components of the developed textbook. In the development phase, the researcher arranged the textbook integrated with Islamic values represented in Islamic names, pictures, verses of the Qur’an and hadith, Islamic messages in dialogue and text, general-moral messages, and tasks/activities. After several evaluations and improvements, the textbook was validated based on the four aspects of textbook feasibility proposed by BSNP. According to the validators, the textbook is declared very valid for content feasibility (4,74), valid for presentation feasibility (4,50), valid for language feasibility (4,50), and valid for graphic feasibility (4,50).