>>9678897 (pb)
Don't know but I am not sure he was referring to a book.
All of You on the Good Earth
“The vast loneliness up here of the Moon is awe inspiring, and it makes you realize just what you have back there on Earth. The Earth from here is a grand oasis to the big vastness of space.” — Apollo 8 astronaut Jim Lovell
The iconic photos on this page are not new, but their message never gets old. Fifty years ago this week, three men traveled farther from home than any explorer had ever wandered. And like any travelers, their thoughts occasionally wandered back to their precious home.
The black-and-white photograph shows the Earth rising over a horizontal surface on December 24, 1968, as the Apollo 8 crew orbited the Moon. The spacecraft was near 110 degrees east lunar longitude, with the horizon stretching about 570 kilometers (250 miles) ahead.
The color photograph below, shot the same day by William Anders, is presented here in the manner in which he saw his home planet rising before him—in the vertical plane. On the Earth, the sunset terminator crosses Africa, and Antarctica is the white area near the left end of the terminator. North and South America are under clouds.
https://earthobservatory.nasa.gov/images/144427/all-of-you-on-the-good-earth
Maybe he just thought the Earth was good in general as he was floating around in space not on the Earth. Away from home so to speak.