The Topical Line Drives series features content that is succinct and goes directly to the point. In addition, by using simple design and minimizing marketing show, we can keep the books in this series low cost.
In paperback (perfect bound), each title costs $5.99. The Kindle (and other ebook editions) are $2.99. A limited selection of titles are available in hardcover at $17.99 each, primarily designed for libraries.
This page on Amazon.com lists Topical Line Drives titles.