I'm about halfway through
Midnight in Chernobyl (history of the nuclear disaster) and it is very good. There's a LOT of people to keep track of, but in general you can keep up with the story pretty easily. The author does a good job of discussing the history of the plant, discussing the hazards of nuclear power and radiation exposure without getting too into the weeds, and explaining how Soviet bureaucracy and attitudes played into the construction of the complex (and others), inherent issues (both in design and construction), coverup of other accidents/incidents, performance of personnel at the plant, reasons for the disaster, disaster response (including available personnel and equipment), construction of the "sarcophagus", medical issues, legal proceedings, international impacts and responses, etc. I'll confirm whether the rest of the book is as good, but so far I recommend it if you are at all interested in this topic.
It appears that there are likely a few inaccuracies here and there with technical items and such, possibly due to relaying a highly technical topic in a non-technical way for such a history to be told, but I'm not going to get too hung up on that in relation to the overall story, which appears to be well researched.
I may also read through this, depending on length and interest after I'm done with the book:
Chernobyl Witness: A primary source compendium of 26 April 1986
Edit - well, that was quick. The book had a section with some photographs, etc., at the end so only about 2/3 of the book was actually text. Recommended.