For learning about operational amplifiers (op-amps), several recommended resources include Jiri Dostal's rigorous book from 1993, which offers clear explanations but is expensive. Walt Jung's 2004 work is noted for its practical applications, while "The Art of Electronics" by Horowitz and Hill provides a solid introductory treatment. Additionally, Wikipedia serves as a useful starting point with links to further information. Overall, these resources cater to different levels of expertise and application needs in op-amp study.