There's a really interesting book series called "The Cross Time Engineer". It puts a modern day engineer back into the middle ages and follows his path to rebooting an industrial society from just the knowledge in his skull.
While it's surely not wholly accurate, everything related to the material science and technology level is at least plausible.
While it's surely not wholly accurate, everything related to the material science and technology level is at least plausible.
http://www.amazon.com/Cross-Time-Engineer-Adventures-Conrad-...