The Holmes Companion is a great expansion for the 1978 Dungeons & Dragons Basic Rules (the "blue book" or "Holmes" rules). It offers some rules variants and extends the rules to cover levels 4 through 9. The original link to download the latest version of this resource is http://meepodm.googlepages.com/holmes.pdf. If that link is down, you can get the latest version I have archived, here:
DOWNLOAD THE HOLMES COMPANION [PDF]
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