Role Aids were the unofficial add on books & supplements for Advanced Dungeons & Dragons first edition. A personal favorite of mine was Giants (Role Aids) by Bruce Humphrey which was published in 1990. And the reason why its a favorite of mine is that Giants (Role Aids) gave a consistent history, culture, background, & even adventures for their giants.All of this was framed for the giant's themed campaign setting. Now according to the Role Aids product line; "Giants was written by Bruce Humphrey, with art by Ray Rubin, and was published by Mayfair Games in 1997 as a 96-page book '.
Giants takes the idea of the Role Aids line & expands it; "Giants is a supplement describing 12 types of giants in detail: their homes, histories, spells, magic items, pets, and allies. With five new types of giants: chaos, dwarven, forest, sea, and death. It also includes rules for giants as player characters and a campaign-setting description of Clanfast, a giants' city. " There are ton of ides within Giants (Role Aids) by Bruce Humphrey that can easily be transcribed to the table top level. The type is easy to read, the ideas here well defined, & the material easily convertable over to old school or OSR games.
Beause of the easy going nature of Bruce Humphrey its easy to get lost in the over all plot of giants & everything seems the better suited for an old school Sword & Sorcery game then an over the top Tolkein romp such as :'Lord of the Rings'.