The consistency on relying on an Art book for reference should be limited as what is for, not to copy or promote the way the artist work, wile learning, do not make the same mistake, getting prompt to co exist with some one else ideas could be harmful. So instead of expanding towards a better view go off the books, Is not certain, but it might not help you in to advance as your full potential. Try the approach and the concept in in Art instead in Art museums or Galleries you will have a better understanding.
If there's nothing wrong with it you should be the judge of that, But to do your work in some one else behalf , to do your own work will not be fair. It is good to get instructions and tips how to?, And Perhaps a Sketch to make you Understand, but in the same manner afterward' You should expand as self in to your own creative Journey". Yet some might follow genre' or a certain Artist because they feel they are connected in certain way".