I'm creating some commercial content that will deal with techniques for playing solo DnD. In the text I will be referring to the 3 core books, to guide readers, but will not be drawing any content directly from the books.
e.g.
The DMG has a section of rollable tables to generate adventures.
Is it within the terms of the OGL to use the terms PHB, DMG, and MM in place of copyrighted titles?
Another option I had considered is to have a terminology along these lines, in the introduction to the publication:
PGB: The official player’s guidebook.
GMG: The official games masters guide.
MoC: The official manual (or bestiary) of creatures.
PGB: The official player’s guidebook.
GMG: The official games masters guide.
MoC: The official manual (or bestiary) of creatures.