Some writing suggestions from someone who has not written a book. However, this is what I would do.
1) Go to the library or bookstore and find where you expect your book will be placed when it is finished. Read some of the books that are there already.
2) Write a first draft without trying to revise it. Just get something finished. Continue reading similar books to the one you are writing.
3) Revise your draft so another human being will find it worth reading it. By this time you should not need to read any other books if you have done steps 1 and 2.