"Biology Grade 9-12 Books" is the ultimate iOS app designed to empower Ethiopian students, offering a treasure trove of knowledge at your fingertips. Whether you're following the old or new curriculum, this app provides free access to a comprehensive collection of grade 9 to 12 Biology textbooks and teacher's guide books. With an easy-to-navigate interface, it simplifies the learning process, ensuring that you have all the essential resources needed to excel in Biology. Say goodbye to heavy backpacks and hello to a world of knowledge, available anytime and anywhere, all in one convenient app.