"Books like these demand a certain agreement between writer and reader. The writer must be a knowledgeable guide as they lead the audience deeper into the topic. When done well, the resulting pages look effortless—but authors need to do a lot of background work to be able to explain difficult concepts in clear terms. (An old bit of editor’s wisdom applies here: Often, journalists who are struggling to draft an article don’t have writer’s block; they’re just not done reporting.)"