The Amazon link for my Applied Analog Electronics textbook (https://www.amazon.com/Applied-Analog-Electronics-First-Course/dp/9811254966) just went from pre-release sales to fully live (2023 August 8). They are selling the hardback (978-981-125-441-3) for $176.30 and paperback (978-981-125-496-3) for $85.03, which is 11–13% less than the list price from World Scientific Publishing.
If you liked my book or course, go ahead and leave reviews there (though you should mention that you used a pre-publication draft of the book)! Reviews are important to book sales, but there aren’t any yet.
The PDF of the book (with the same content, but different pagination and different cover) is still available through LeanPub for $7.99 at https://leanpub.com/applied_analog_electronics. I get a little bit smaller royalties per copy from these sales (unless you pay the “recommended price” of $14.99, instead of the “minimum price” of $7.99), but I really wanted to make sure that a non-pirated, low-cost option remained available for students, so I got the publisher to agree to a contract that allowed me to sell electronic versions on LeanPub or on my own website (should I ever have one that enables sales). Also anyone who bought the LeanPub edition (even with the free coupons I distributed to the class) can get the latest version of the PDF for free by logging into the LeanPub site.
Note: this post updates the earlier Amazon site live! post.