Translation of research in Spanish

I am sorry that I did not respond to your last email you sooner. Have you been busy with your work? Do you have any meetings or travel planned? I have friends around the world and they call me Mike.
The books had cost only two or three dollars, cheap even for second hand books and after buying them I discovered that these were actually copied books and not used books. It was too late.
Although you need at least 2 weeks to visit Peru, it was worth being there for 5 days. It definitely gave us a taste: we will be back for a longer stay.