How to concentrate in a world of beeping smartphones, channel surfing, live-tweeting, pop-up ads, and other distractions.

We are in the midst of an attention crisis—caused in large part by our smartphones. There's a constant stream of information that we are powerless to withstand because it shows up in our notifications. More and more of us are finding it harder and harder to concentrate.

The good news, attention expert Stefan Van der Stigchel reports, is that we now know more about brain and behavior than ever before, and he draws on the latest scientific findings in his account of concentration. He explains, among other things, that the battle for our attention began long before the digital era; why our phones are so addictive; the importance of working memory (responsible for executing complicated tasks) and how to increase its capacity; and why multitasking is bad for our concentration, but attention rituals help it. He describes the 2017 Oscars debacle (when the Best Picture presenter was given the wrong card) as a failure of multitasking and shows that the presence of a passenger in a car reduces the risk of an accident. He explains the positive effects of taking "tech breaks", meditation, and even daydreaming. We can win the battle for our attention, Van der Stigchel argues, if we have the knowledge and the tools to do it.