The word tome means large book. I think Codex Amiatinus is the largest book I've ever seen: an Anglo-Saxon bible a foot tall. Quite exceptionally large and a beautiful piece of work from 1300 years ago, it is the oldest surviving, complete Latin Bible in the world.
Made at the monastery of Wearmouth Jarrow in the North East of England, it is back in England for the first time since it was sent over to Rome as a gift to the Pope. The British Library exhibition Anglo-Saxon Kingdoms is a show full of books and writing, and a fascinating journey back to the beginnings of the English language. I just wish I could understand it better.