Hi there Marcio. I agree that he should have the heading of the question "What does body book
At least he parenthesized "body book", as we are citing his title I italicized it.
Thanks in advance can be used, it´s a fixed expression. I like to play with words and once I answered half-joking "you are welcome in advance", but the learner can use it, with care not to overdo it! Ha ha.
Although in formal ways it´s not advised, because you thanks someone for something done, and if you thanks in advance it suggests that the other party will have to do something for you, theoretically I mean. So, when we send an email to someone else (in a more formal setting) asking to do something it´s not advisable.
Anyway, here there are some ways to express gratitude for some likely help in other ways.https://macademic.org/2011/06/08/never- ... n-advance/