Recommended books for 2nd ECE is: 1) mathematics-2: G.balaji or singaravelu
2)technical english : macmillan publication
3)Engineering physics-2 : p.mani
4)Engineering chem-2: A.Ravi Krishnan
5)Electric andelectronic devices -k. Bommanna Raja and S.Sasi kumar 6)Basic Civil & Mechanical Engg -P.Purushothama Raj and j.aldrin raj
These are the used to score good grades, i too personally recommend this. All the best for your future
"We learn from our failure, not from our success"