Below are a couple links to blog articles which overview the synthetic Bible study method of Dr. James Gray. Gray was former President of Moody Bible Institute and one of the authors/editors of the Scofield Reference Bible.
Essentially, the system boils down to reading and rereading a single Bible book over and over until you internalize it and then move on to another book. I first heard of this method in a John MacArthur sermon, but have later come to realize that this method pre-dates MacArthur by quite a bit.
You can read the book for free by clicking the image below –