Free JEE ADV-13 Course
I would recommend you some books.MATHEMATICS:1.M.L.KHANNA2.arihant new pattern
PHYSICS:1.H.C.VERMA2.HALLIDAY Resnick and walker
CHEMISTRY:ORGANIG CHEMISTRY: MORRISON AND BOYDPHYSICAL CHEMISTRY:PETER ATKINS,P.BAHDURINORGANIC: J.D.LEE
ALSO BUY 30YEARS IIT-JEE QUESTION PAPERS BY ARIHANT PUBLISHERS.
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Go for a correspondance course material( not the usual ones given to students who attend classes but the postal course one). i would advice Brilliant's or vidya mandir's
And the following books
H.C.Verma(for electrostas and mechanics), Waves and thermo(by D.C.panday), optics and modern(by D.C.panday)...... A.Das Gupta(for maths)chemistry package and NCERT(for entire chemistry)
They are enough and self sufficient for cracking iit jee