The books in the picture are only an example of the books you receive. Each lot is a random mixture of books but all will meet the criteria.
These are done by linear metre on the shelf so depending on the thickness of each book the total number of books will vary but it will be about 40 or so books.
The books have had all their dust covers removed, leaving a black cloth bound hardback.
The books are all standard sized hardback books (22-24cm high).
They are ex-library with the usual stamps and markings internally, but are in good condition and as you can see from the photos this doesn't show from the spines..