I purchased on ebay two books for making my own solo RPG missions. I’m having fun relearning dnd role play. It’s been years since we’ve played.
The first book I picked up is the Creature Collection: Core Rulebook (Sword and Sorcery).
The second book is the Dungeons and Dragons Player’s Handbook Core RuleBook v. 1
I’m trying to find a shadow run core rules book, which was one of my favorites in my 20’s. So far even used they’re expense.
So no luck yet.