I went throught the same process and I had to pay taxes on it!!! I paid taxes based on the declared valued prior to shipping. I was advised to do that because there was a good chance that I would be charged
I brought my car and books and paid taxes on both. I can understand the car but not the books really. I guess they are concerned about what kind of books are entering the country. I ended up paying less tax by hiring a customs agent and it was at the end dirty cheap so I did not bother.
Do not let your good to stay there in customs...clear it as soon as possible because storage is charged on a continuously basis.