It's very important. The back cover gives an overview that can attract or repel potential readers. It can set the tone for what to expect in the book, like if it's a mystery, the back cover might give a tantalizing clue.
To quickly flip to the back of the novel, you can search for "novel reader" in the mobile browser or application market and download it. Then, when reading the novel, you can click the "back" or "forward" button on the page to quickly flip the page.
Some readers also provided shortcuts such as pressing "Control"+"Up/Down Arrow" to scroll to the top or bottom of the page, and pressing "Control"+"Home" to return to the beginning of the article. Through these shortcuts, he could flip through the novel faster.
You can also install some reader applications such as "Panda Book" and "Kindle" to provide more page flipping and bookmark functions to make it more convenient to read novels.
One way to tell is by checking for references or sources mentioned. Also, see if the language and tone are objective and based on facts rather than pure emotion or speculation.
By creating a sense of mystery. For instance, it might hint at a mystery that the main character has to solve while being haunted by something unknown. This makes the reader curious.
NPR likely covered the Unabomber's back story by interviewing experts on criminal psychology. They may have also talked to people who knew Ted Kaczynski personally, like former neighbors or classmates. By gathering these different perspectives, NPR could piece together a more complete picture of his background, from his early days as a bright student to his descent into becoming a serial bomber.