ehem…
puts on tinfoil hat
I know what happened to your books. The little people took’em, took’em all! They don’t want you to know stuff, no no no…They want you to be dumb, they want you to stop crafting stuff. Why, you ask? Why else, they are preparing for an invasion! They can’t let you have shiny, strong weapons, or armor, or explosives, of course not! Watch yourself, they will come in the night, when you least expect it. First you will realize that more stuff has gone missing, first clothing, then ammo, food, guns, and when they think you are ready, oh then…then they will come. You will hear their tiny feet on the ground, like a horde of mice or rats, coming for you. When you see them it’s already too late. Run, Johnny, run! Your only chance of survival is to flee from the menace of the little people!
takes tinfoil hat off
I don’t think any inventory overflow bug would apply in this case, considering it wasn’t your inventory, AND that those books were apparently not even in the reality bubble. Maybe you put them somewhere else? Maybe into the welding Rig itself, considering that it has some space to put stuff in it? Weather shouldn’t damage items, acid or lava would though, but those weren’t close I’d imagine. Or maybe you moved the welding rig and it stands on top of the books now.
In any case, I will leave you with this link: https://github.com/CleverRaven/Cataclysm-DDA/issues ; open up an issue if you believe it’s a bug. or you could ask one of us to open it for you, if you don’t want to create an Account. In any case, I’m sorry for your loss, I know how bad it is to loose books, especially since you won’t automatically learn all the recipes anymore.