Online bookstores such as Amazon are a great place to find Bachman Books stories. You can search for them by title or author and usually get both physical and digital copies.
Well, Bachman Books might have a variety of novels. However, without having access to their full catalogue or more detailed information, it's difficult to determine exactly which four are the early novels. Maybe one could start by looking at the publication dates of their books and sort them chronologically to find the earliest four.
Well, I haven't read it in detail. But generally, it might showcase the early writing styles and themes of the author. Maybe it contains some unique characters and plots that are characteristic of the author's early works.
In Richard Bachman short stories, the main characters range from the downtrodden to the ambitious. You might find a factory worker struggling to make ends meet, or a young person with big dreams but in a harsh environment. These characters often have to deal with external pressures like poverty, social injustice or a corrupt system. They are not the perfect heroes but rather real - life - like figures with flaws and desires.
We can expect to see the author's early creative ideas. It might have some interesting storylines that are different from what the author is known for later.
Since I don't know the specific four early novels, I can't recommend their features. But generally, early novels might have some experimental writing styles as the author is still finding their voice.