Translation of point of view in German

I am Spanish Teacher. I graduated last year, in August. I studied mostly in Germany. I have been working for nine months as a teacher in many language schools but soon I will be a student again.
I wish you a good trip, when you come to Germany in June! How do you long stay in Berlin? Please help me with my English, in return I will help you with your German. Wish you a nice day!
I guess it is a very interesting book, but I did not entirely understand it. What did the author try to say, what message did he want to deliver? Do you want that I recommend another book?