Copyright Infringement

Story:

Mark is going to make a book called "Round Earth vs. Flat Earth" that he doesn't engage to his own creativity with his theories and real-life information. However, he copied a lot of information from online blogs, such as Wikipedia and Live Science by the authors of Natalie and Michael. Also, he doesn't put the references from their articles (such as "Spherical Earth, Flat Earth, and Are Flat-Earthers Being Serious?") at his book. Then, he legally sold it to thousands of people. Considering, he stole their work so that his daily plan reached about $20,000.

1. Upon completion of this story, please identify the original work it infringes upon.
2. Indicate how using such story in another forum or way might constitute "fair use" and thus not subject you, as user, to copyright infringement remedies.