I know that no writing is allowed in books that are posted here (cookbooks and textbooks--special cases). However, I've run into something in a book I received and I'm not even sure if it would constitute writing.

While reading a book I received from here, I found a page that has a mark on one page--it's not writing, not a number, and doesn't obscure any text. It looks as if it might have been a pen mark that just hit the margin (it's really hard to describe it) or it's a defect from the manufacturer. It's about a 1/2 inch long and as I said in the margin. I'm soon going to be done with reading this book and I want to know if it's postable or not. I don't want to send something that would be considered unpostable but when I read writing, I think of it as being words, notes, checkmarks, etc.

It's the third book in a trilogy and I have the other two so if it's not postable I could offer it as a freebie if someone orders the other two books.

I keep running into the weird stuff in my books--not the ordinary easy to see and obvious stuff!

to me it wouldn't be a big deal but many will say it isn't postable.  I can see where you have to have rules and if people bend them for things like this, will they bend them for bigger issues?  (not saying you specifically but you in general!)

I have as a Requestor Condition that I won't accept books with writing on the pages of the body of the book, but what you have described is a "mark", not writing. To me, writing means notes, underlining or highlighting, or a book that has been used as a coloring book by someone's 3 year old. You say it could even be a printing defect-- I see those in lots of books.

My opinion is that it's postable.

Mike (Cindy's husband)

It wouldn't be a big deal to me either. However they made the rules for a reason and it is good to follow them.  I had a book I was going to post..ok I did post it, bit after someone requested it, I was flipping through and found  about a half inch of inderling.  I pmed the person and offered another book off my shelf and would send the underlined book for free...she didn't want another book, but was ok with the underlining, so she said send it...she REALLY wanted it.

A 1/2 inch of underlining in one place - in the entire book? If that were the extent of it, it'd take a really rules-obsessed requestor to take the time to make an issue of it. 

Could it be a remainder mark or a used book store marking? Some UBS' won't buy back books they sold (don't ask me why) and will mark them in a way that only they know to look for. The help center says marks like that are completely allowable.

Yep, it sounds like a remainder mark to me, too.  Those books are postable.