For a comprehensive listing of legacy K-Line products, go here:
http://www.legacykline.com/apps/kl/kline_ui.html
Unfortunately, the site is down temporarily due a computer crash; however, the site will probably be up by the end of August.
I'm surprised that Lionel or any of the current K-Line manufacturers are allowing this site to exist.
In any case, the listings are remarkably complete and the site, when it is up, is a great resource for researching legacy K-Line products.
The reason there is no Greenberg book is that legacy K-Line wouldn't let any publisher print a product guide. If I recall correctly, Maury Klein, who owned K-Line, threatened legal action against publishers who wanted to print guides to K-Line products. However, at one point, K-Line issued a pocket guide.