Could this possibly be a way to explain your profession if you are an author? If someone asks you what you do for a living, can you say "Ich schreibe Bücher"?
Yes, you could. You could also say something like "Ich bin Schriftsteller" (I am a (professional) writer).
What would the surname Schreiber translate to? (assuming it is related to this word)
It's telling me "I am writing books." is wrong, it should be 'I am typing books.' It definitely tells you the word means write or am writing. oooo-eeeee, what up wit dat, what up wit dat?