My book of the month is The Time Traveller's Guide to Medieval England by Ian Mortimer.
This book covers just about every imaginable aspect of life in fourteenth century England, and indeed some that are pretty unimaginable. To quote from the blurb: 'How do you greet people in the street? What should you use for toilet paper? How fast - and how safely - can you travel? Why might a physician want to taste your blood? And how do you test to see if you are going down with the plague?' It's all this and a lot, lot more.
For anyone newly aspiring to write novels about late medieval England it's an invaluable source that will save you days and weeks of research. For those of us who thought we had done that research, it's a reminder that we didn't know everything, and a useful insurance against future bloops. Sharon K. Penman would never have put that famous grey squirrel in Sunne In Splendour if she had had this book.
Don't mess about - just buy it!