The question mark is doing real work in this title. Why String Theory? declines to assume that the listener is already convinced, which is the honest position to take on a subject that has divided physicists for decades and shows no sign of resolving quietly.
Joseph Conlon comes to our shelves through that book, filed under science and engineering, and the length tells you the level of engagement on offer. Nearly twelve hours is no popular-science flyover; it is room enough to set out what the theory proposes, why it attracted a generation of physicists, and what the objections actually amount to. A book that asks why owes its listener a proper answer, and this one has the space to give one.