You do all the books in one sitting. Pile them up and PhotoRead the stack.
You'll have done the light preview necessary when you selected the book.
If you are direct learning then your goal and purpose is one and the same for the whole stack.
If you have a different purpose for each book either get four more book for each purpose or use all the steps of the PhotoReading system on the books.
Direct Learning is for acquiring or changing a habit or skill. Not for learning a subject for passing exams.
Alex
