Am I able to send a blank journal or diary via Media Mail?  How about a journal or diary that has hand written entries?  Or other items that are bound like books (eg, a really nice blank address book that has an ISBN)? 

I think I goofed when I sent the blank journals via Media Mail to someone from eBay.  But it would still be nice to know as I have more and still have the address book.  (I know one of the journals has reached its destination just fine; another is somewhere out in postal limbo.)

I don't think so.  I know you can't send blank CDs, since there is no media on them.  I would assume that a blank journal or diary would be the same.  Handwritten--not sure at all!

Media is not the information, it's what carries the information, like a book or cd. Yes, you can ship a blank book media mail. Any bound materials qualify.

Not all bound materials qualify -- magazines don't.

Now I'm starting to wonder about a lot of things I have here and want to get rid of. 

Scholarly journals are periodicals and they probably have advertising in way of Calls for Papers and orders for items published by the same press, but not the same advertizing you would see in a magazine.

Not all bound materials qualify -- magazines don't

Magazines don't qualify because they are considered periodicals under USPS terms, not bound printed material.

What about bound periodicals?  A year's worth of mags bound with a hardcover.   Academic libraries fequently do this. 

I thought the issue with periodicals was advertizing.

I've also been told the issue with magazines has to do with advertising.

I make small scrapbooks as Baby gifts, and have avoided mailing them as books, but a postal employee told me I could.  I'd like them to get there quickly, though, so I don't.