edX's 6.002x: Circuits and Electronics also provides the textbook for free with similar conditions. The textbook in question is The Foundations of Analog and Di

edX's 6.002x: Circuits and Electronics also provides the textbook for free with similar conditions. The textbook in question is The Foundations of Analog and Digital Electronic Circuits ($79.99 on Amazon) by Agarwal and Lang published by Elsevier