Hello Deepanshu,

Some of the books are as follows

Circuit theory:



Chua, Desoer and Kuh, Linear and Nonlinear Circuits, McGraw-Hill, 1987. This is out of print and hard to find and expensive even in 2nd hand. Once you study circuits in this book (mainly techniques for dealing with nonlinear circuits), you will despise almost all other books in the area. Besides this, one there is worth is the olderDesoer and Kuhs Basic Circuit Theory, McGraw-Hill, 1969.



Electronics:



The fundamental book IMHO isGray & Searles Electronic Principles, Wiley, 1969. Here you find the basics of analog and digital circuits design. It is outdated but you learn the fundamentals. Deep discussion on the electrical behavior (even nonlinear dynamics) of diodes and transistors. Bare-bones feedback analysis.



Another fundamental one isGray & Meyers Analysis and Design of Analog Integrated Circuitsnow in its fifth edition. Its very worth finding a cheap used copy of an old edition, any of them. This book teaches greatly the art of designing analog ICs, with bipolar or MOS technologies.

Hope it helped you

Thank you