I sent out several packages in one day.....not all to PBS.  some were gifts and other things but it seems that all I sent out that day have either been rec'd damaged, been returned to me or not rec'd at all.  I'm concerned about the 2 books not being rec'd what will happen?

Janet, as per the Help Center:

If a book you requested does not arrive by the 26th day after it was marked mailed, it will be declared lost in the mail at PBS. The requestor does not mark the book Lost; the system does this. 

The requestor will get credit back, and the book will go onto the Wish List (if there are no available copies in the system) or the Reminder List (if there are other copies available to request).  If the book was a Wish List book when it was requested before, the requestor will go back to #1 in line for the book.

You will thus lose credits for the book, unless you purchased PBS Delivery Confirmation or PBS Printable Postage.  Here is the link to tell you what to do if your book is declared lost by PBS: 

http://www.paperbackswap.com/help/search.php?terms=lost+book  and click on "A book I sent is lost in the mail' link.

When did you send them? There's a reason PBS gives 26 days for books to arrive before markign them lost.  Because sometimes it takes that long or even longer.

thank you both...one of the books has been rec'd the other hasn't so far...it's not been the 26 days but was concerned because of the problems with the other packages sent the same day.

Yuck that's disappointing!  I've been pretty lucky so far *fingers crossed*  I hope your other book arrives safely!  Sorry your other packages were damaged. :(  I guess someone at the post office was having a rough day!