Free Range VHDL - https://fpgaer.tech/?p=371

The Zynq book – free pdf: https://fpgaer.tech/?p=198

Understanding Machine Learning – free book: https://fpgaer.tech/?p=224

FPGA for dummies – free book: https://fpgaer.tech/?p=191

High Speed Serial I/O – free book: https://fpgaer.tech/?p=218

FreeRange – Logic/Verilog free books & courses: https://fpgaer.tech/?p=330

Introduction to Verilog: https://fpgaer.tech/?p=302