The Pentateuch is what is covered as far as the Old Testament. The approach is book by book and verse by verse. That is a very fine feature. Easy to use for anyone. The CD comes with the STEP compatible 2 book set.
Searches are a big plus.
One can zip through research. I really recommend this scholarly, interesting, and useful tool from Parsons. I do not know the price of the O.T. book version. But as you can see, you will really save money by getting the material on CD, not to mention time and space as well as weight. A must for serious scholars and researchers.