I read that in Robert Shelton's great bio of Bob titled NO DIRECTION HOME.
Actually what is written in Shelton's book is that when he was a child or teenager the only comics Bob read were Illustrated Classics. That is the same as Classics Illustrated.
I am sure he also read many full length novels.
But many high school kids back then used Classics Illustrated to make their book reports.
https://images.search.yahoo.com/search/images;_ylt=AwrBT4HI5hlY7lIAHctXNyoA;_ylu=X3oDMTEyMm43aWFsBGNvbG8DYmYxBHBvcwMxBHZ0aWQDQjE5MTBfMQRzZWMDc2M-?p=Classics+Illustrated&fr=yfp-t
Fastest way to the Nobel Prize for Literature.