They remind me, in approach, of the classic Hack & Slash treasure document. Table after table attempts to exhaustively catalogue the subject matter. These two PDFs (this one and Locks, Vaults & Hiding Places) don't quite reach the transcendent heights of -C's classic though.
The LGT starts off strong, with tables for a book's shape, size, material, subject matter and age. Tables for the filing system a library uses. Tables for the experts' interpretation of a book. Anything and everything you could need to stock a library!
On the downside, it's plagued by formatting problems and really disorganized. There are sections or headings - it's just table after table after table mixed together, unrelated entries side-by-side. Sometimes a new magic item is thrown into the middle! If I want a specific table, like "lost in the library," there is no way to know that it's on page 3 between the table for "number of buildings in the library" and the description of "The Book of Worthless Facts and Useless Information." Of course the short length of the document itself means it can't ever take that long to find anything, but... didn't we learn from the 1e DMG?
Sometimes instead of a table, there is a list or a few suggestions on a given topic, like "Specialized Libraries: Medicine, Law, Religion, Magic." I feel as though these could have been cut, moved to their own section or expanded into full tables. They seem like afterthoughts, and probably should have been cut completely or expanded.
Overall, these PDFs are rough around the edges but can be useful if you look past the formatting and other issues. For a buck the LGT is worth a look. If Hamilton did a real editing pass, trimmed the fat and expanded a few sections, added headings, etc, these could really be great resources. But they aren't there yet.
originally posted at terriblesorcery.blogspot.ca