The gym in Bairnsdale where I do my exercises also has a book table. Patrons take in books that they are finished with and they are then available for others to buy for a gold coin. The money raised goes to a local charity, a different one each year. As soon as I spotted this one on the table I knew I had to get it.
I have read all Ian Rankin’s series of John Rebus and this is the most recent. What a bargain for a gold coin. I read the book in two sittings. Rankin does not disappoint.
Gippsland Granny 
Leon has just finished this too and he could not get into it,took him ages!! Far more than two sittings!
Sounds like a great find for you. What’s a gold coin worth?
A gold coin in Australia can be $1 0r $2.