Much like the others, I recommend Sedra and Smith - Microelectronics. We've been using the 5th edition of this book for three Electronics courses at my University in the EE program.
Start reading the following books:
- Fundamentals of Microelectronics by Behzad Razavi
- Design of Analog CMOS Integrated Circuits by Behzad Razavi
- Analysis and Design of Analog Integrated Circuits (4th Edition) by Paul R