In one hundred glimpses of that pre-Internet world, Pamela Paul, editor of The New York Times Book Review, presents a captivating record, enlivened with illustrations, of the world before cyberspace—from voicemails to blind dates to punctuation to civility. There are the small losses: postcards, the blessings of an adolescence largely spared of documentation, the Rolodex, and the genuine surprises at high school reunions. But there are larger repercussions, too: weaker memories, the inability to...