No textbook is perfect. Neamen’s book is sometimes criticized for being (e.g., FinFETs, quantum dots, or 2D materials like graphene). The 4th edition adds some discussion of short-channel effects, but for cutting-edge research (sub-5nm nodes), you will need journal articles. Additionally, the mathematical rigor, while accessible, occasionally glosses over advanced quantum tunneling effects that matter for flash memory design.
"Semiconductor Physics and Devices" (often abbreviated as Neamen in course syllabi) is not a light read, nor is it meant to be. It is a reference and a teacher. Whether you access it via a physical library copy or a dog-eared PDF on your laptop, the value is the same: a patient, clear, and rigorous guide to the physics that makes modern electronics possible. Semiconductor Physics And Devices - Donald Neamen.pdf
and their roles in high-speed and optoelectronic applications. Slideshare Core Topics Covered Semiconductor Physics and Devices No textbook is perfect