Jonathan Pritchard of Stanford University has released the first half (still writing the second) of his textbook on human genomics. It is licensed under CC-BY-4.0 Creative Commons License.

Quote from his site:

In this book I describe the forces that govern genetic variation including mutation, drift, recombination and selection, as well as what genetics teaches us about human history, and the role of genetic variation in human phenotypes and diseases. When complete, the book will combine the three pillars of human population genetics - population genetics, population history, and trait genetics - under a single umbrella, with a focus on examples and applications in human genetics. Moreover, each section emphasizes the essential interplay between theory, statistical methods, and biological applications, with a focus on building intuition while avoiding heavy technical detail where possible.