Two suggestions for your weekend reading.
Hacking History
How old is the word cough? What about *cough*? Which other words have been used for cough? All your coughing questions answered. (OxfordWords Blog).
Changing Names
If you read Samuel, Kings, and Chronicles, you will find numerous examples of people who have one name in one book, and another name in another book. Jesse Johnson gives us the two main reasons for this (The Cripplegate).