Quality of Chinese Children Books

I was filling an order today for a customer and noticed the lamination on a book was coming off. In fact all the lamination of the entire series I had purchased as samples was coming off. Hmm... What to do. So I gave the book to the customer for free and removed the others from inventory (giving the customer 1 each of the delaminated books). Quality is extremely important to me in what I sell for childbook.com and the goal is to have a happy customer.