The 2021 edition of "123 PIC Microcontroller Experiments for the Evil Genius" in PDF format can be found through various online sources, including:
The PDF version is the best way to consume this book—if you actually follow along. Don't just read it. Build Experiment #1 tonight. The 2021 edition of "123 PIC Microcontroller Experiments
– the latest known print edition of 123 PIC Microcontroller Experiments for the Evil Genius is from 2005 (by Michael Predko and Myke Predko). There is no official 2021 edition of that exact title. The 2021 edition of "123 PIC Microcontroller Experiments