As Rachel looked back on her journey, she was grateful for Jum Nunnally's work, which had provided her with a solid foundation in psychometric theory. The PDF of his book remained on her computer, a testament to the power of his ideas in shaping her own research endeavors.
You can "borrow" digital copies of the second and third editions through the Internet Archive's Open Library.
For those interested in learning more about psychometric theory and Nunnally's work, there are several PDF resources available: