If you are a first- or second-year engineering student in a program, Basic Electronics: Solid State by B.L. Theraja is still a goldmine for understanding how a diode, transistor, or SCR actually works inside . It will give you a foundation that newer, glossier textbooks sometimes skip.
: Deep dives into P-N junctions, diode characteristics, and special-purpose diodes (Zener, LED, and photo-diodes). basic electronics solid state b.l.theraja pdf
If you manage to locate a legitimate copy (print or digital), here is the typical roadmap the book provides: If you are a first- or second-year engineering
The book is available in multiple formats, including physical paperback and Kindle editions. and special-purpose diodes (Zener