While the full PDF is subject to copyright, digital versions and syllabus outlines are often hosted by academic institutions for student use:
Publicly shared copies for academic reference can sometimes be found via Google Drive links shared by student communities. MAT221V / Introduction to Astronomy - The American College astronomy book by kumaravelu pdf fixed
: Different types of years, geocentric and annual parallax, and the aberration of light. While the full PDF is subject to copyright,