Theodore Roosevelt National Park is a minor gem of the national park system. Something like half of its "visitors" do no more than stop at a rest area on I-94 that is nominally within the park, where they enjoy the vistas into Painted Canyon. Most of the rest go on a scenic drive through the South Unit, where they enjoy seeing a high density of Great Plains animals such as bison and prairie dogs. Fewer still visit the North Unit, about 90 minutes away, with distinct badlands and a somewhat different suite of animals. Only a few dozen make the difficult drive to the Elkhorn Unit, which protects the site of Roosevelt's cabin.
Novey has given us an enthusiastic invitation to visit the park, written at about a middle school reading level. He provides a little bit of information about everything, from wildlife and geology to driving routes and hiking trails. All this information is available once you're in the park, and most of it is also available on the park website ([...]). But here the information is helpfully collected in a book. The book has nice pictures, some helpful maps, and even a quiz at the end.
About two-fifths of the text talks about things to do elsewhere in the general region, which conveys the impression that there isn't enough to do at TRNP itself. That's probably right if you want only a driving tour. There are some pleasant surprises if you're willing to hike a few miles and not afraid of fording a shallow river.
There's enough information here to help you find those places. But I wish the book went into greater depth about the park.