I'll try not to judge you when you use poor grammar.
I am HORRIBLE at a lot of things. For the most part, I'm not an athlete. I will never win a beauty pageant, I have no idea what constitutes a "cute" shoe, and I'm REALLY bad with numbers. However, I can spot a grammatical error a mile away! I will champion proper language skills until the day I die.
With that being said, THIS is NOT correct: This was at a bookstore. So...ALL those books belong to one kid?