sorry if this has been asked before, I am new:0

I received a book and it has been altered (someone whited out some of the text and wrote in other things), The rest of the book looks fine (cover, condition,e tc).

Is this a normal, postable book?

There are a few sections through out the book where this has been done...

Welcome, Sam!  No, the book is not postable by PBS guidelines.  There shouldn't be any markings on the text pages (unless it's a textbook, and white out is really pushing it) and that includes whiting out and making your own text. 

it is a book for homeschooling (a schedule/guide), and some of the scheduled things have been completely whited out and new things written in. I don't consider it a text book--I ordered it because I wanted the schedule content written by the author, not by the previous owner, if that makes sense:)

So  I can't really use this, and it sounds like I shouldn't repost it either.

thanks for responding so quickly, I didn't want to just dump it back into the system if it was not up to par.

You can offer it as a free book with an order of another book off your shelf if you make a post in the Book Bazaar. Someone might still be interested.

Workbooks also fall under the rules that allow writing and highlighting, but condition MUST be disclosed up front and it MUST be accepted by the receiver before it can be sent out. It is possible that it is postable under the texbook/workbook rules, but since you received it without notification, you should get your credit back and you need to follow those rules if you repost it.  Depending on what was whited-out, that could render it unpostable.

I agree with the previous poster.  Make sure you mark the book "received with a problem" and ask for your credit back.