Further along in the book...
Overly seems to give air power its due. He notes that tactical air gives the owning side a huge advantage and likewise in naval combat.
While the accuracy of strategic bombing wasn't anywhere near what was claimed at the time, it still had a heavy effect. Aside from damage to fuel, factories and transport, the 2 million troops needed to man and maintain the 55,000 flak guns was a serious drain on German manpower and industry. And the Luftwaffe was virtually destroyed by long-range fighters in the first 6 months of 1944.
Also, Japan was on the verge of surrender because 66 cities had been firebombed, before Hiroshima and Nagasaki.
Still reading...
Strange fact, not from this book: Tokyo was firebombed, destroying the working class areas and killing some 100,000 people. Young Yoko Ono was living in a more upscale area of stone buildings that wasn't consumed by the flames.