How can I tell if the book I have is mass market?  I have a requester asking for a non mass market book. 

Thanks!

Lisa  

MMPs are small paperback (left).  Trade paperbacks are larger (right).

MMPBs are usually the smaller paperback size ~ 4 x 7 inches or so.

http://askville.amazon.com/difference-Trade-Fiction-Mass-Market-York-Times-Seller-List/AnswerViewer.do?requestId=8104305

Thread hi-jack: at Cosco the other day I saw  almost square sized paperbacks.  They were kind of like the height of MMPs and the width of trades.  What would those be called other than just paperback?

Mini-MMPs?

-RD

They were bigger than mmps.  Mini-trades?

I have a requester asking for a non mass market book.

This is sort of weird RC. I know that sometimes different editions of the same book have the same ISBN but if the ISBN she wished for is MMPB, then she'll get all declines.

There is also the really tall mass markets.  E Z read size?

I know my Dad can read the trade sized type, but can't read MMPB.  And a friend of his can't read the trade sized as the weight is too much for her arthritis.

I don't like the extra tall mass markets, they seem harder to hold for me.