Former BCD Travel research director Claudia Unger points out that 76 U.K. universities offer a combined 450 tourism-related degrees, none of which focus on corporate travel. If a new program started, her recently published book could fit on the reading list.

"Corporate Travel: Hiding in Plain Sight" (CreateSpace Independent Publishing Platform, 2016) is written at the 101 level in academic textbook style with a conversational tone. Travel management veterans likely won't learn much. Newbies will. So will senior executives who may not have an appreciation for the field's intricacies.

Before working in corporate travel, Unger was . . .

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