Schematics loot has been drastically increased in book shelves, especially at crackabook stores and HQ's, schematics were put it into working stiff boxes, gun bags etc. so there is far more chance of you finding them than a vanilla game. For the workstation schematics you have a high chance to find a forge schematic or workbench schematic in broken forges or broken workstations. On top of that there are schematics that unlock multiple things at once such as Expert Cook, Advanced Drinks, Better Mechanic, Advanced Drugs Etc, now these don't drop until a little later game, but they are there so if you don't find the individual schematics you can get them all in a single book.