This site is popular for hosting core engineering books in Tamil, such as S.S. Bhavikatti's Basic Civil Engineering , which covers materials, planning, and surveying.
These sources provide downloadable PDFs specifically designed for Tamil medium learners: Basic Civil Engineering by S.S. Bhavikatti (Tamil PDF) diploma in civil engineering tamil medium books pdf
Several community-driven sites host curated lists of semester-wise course materials. Padeepz DOTE Books : This platform offers M-Scheme course materials This site is popular for hosting core engineering