I received a WL book today that was supposed to be a paperback; but I got a hardcover, ex-library book instead.  Also, I don't believe the ISBN is the same because this HC doesn't seem to have an ISBN.  I remember when I ordered this book, I looked at their "shelf" to see if I wanted to order anything else and this hardcover edition is also listed on their shelf.  So, I'm guessing they had both paperback and hardcover and sent me the wrong one, so this one is still on their shelf. 

I read in the help docs (and a few forum posts) that I should mark it as RWAP and ask for the credit to be returned, and an additional credit if they want the book sent back.  I will need to use this book soon, and I'm afraid it will take too long to sort it out and get the right book.    I am kind of disappointed... the book is usable,  it's just not exactly what I wanted.  This was one of my wishlist books. 

So, how does this get fixed?  Should I mark it as a RWAP to let the mistake be known, and so that their shelf can be corrected; then get over it and just keep this book?

Normally when you receive the wrong binding or wrong ISBN like that, you mark the book "received with a problem" --> "wrong book" and you have the option of asking for your credit back.  In this case, since you think the sender may have the correct edition too, you could PM him and ask him if he'd like to refund your credit or send you paperback.  You would only return the current copy if 1) he asks and 2) you agree and 3) he gives you a credit to cover your postage costs.

There's a good help doc called There is a problem with a book I received!

I'd mark it RWAP and ask for the return of the credit.

Then when they PM you they can let you know if they do have a copy in the original binding or not, or you can ask. Then see if they'll send you the right copy in lieu of returning the credit to you. But you'd have to make it well understood that you need immediate shipping.

If they're not interested in sending you the correct book, if they even have it, I'd go ahead and order it from someplace else with immediate shipping. If/when you get your credit back, you don't have to order the same book. You can spend it on something else.

And don't forget to check the inner pages for ISBN. Many books will have the ISBN inside with the copyright date and publisher information.

I'd mark it RWAP, wrong book.  But I'd be fine with the different binding, so I would not ask for the credit back. 

But it is important to mark it as the wrong book.  For some folks the binding does matter.  I know my Dad cannot read the small type on paperbacks.  And my Aunt cannot hold the weight of hardcovers.  PBS requires the binding to match the listing.  This mistake should be on their record.  The asking for a credit or not is up to you.