Finding a Library Book with Missing Pages After Going Home

Ugh, I wished I had checked before I came home with a damaged book. This is the second time it's happened. 

On the surface, the book, Why I Let My Hair Grow Out by Maryrose Wood, had looked fine: 

On the bright side, it's super-worn, which is a sign of a well-loved book. 

But when I opened it to skim the pages, I found this at the end: 

A book with no ending breaks my heart and drives my mind crazy. 

I'm not sure what to do. At this point, the library might hold me responsible of the damage even though I didn't do it. I can quietly return the book and hope no one notices the loose/missing pages. But I also don't want another book with missing pages circulating the library. 

I guess I'll keep it with my other library books and decide when I go. It'll be a while since I have quite a queue of books to read! 

What do you think I should do? Have you ever checked out a book with missing pages? 

Thanks for reading!

--Ellen

~~~Update 8/28/2013: I just found out on Amazon that the book has a total of 218 pages. This means that only one sheet is missing. One sheet!!! Who would be so cruel as to deprive the next reader of the last two pages? I might consider reading it anyway since it seems like a good book, but ugh...whatever the characters say on the last two pages will be lost to me unless I find another copy.