They make this sound like a feature, but Google places an ad inside of the ebook you want to read. I have to tap the screen inside of the ebook on Google books every time I open my ebook to remove the ad, and if I accidentally hit the ad it pops up with 5-6 other ebook suggestions and prompts me to buy the ebook they are advertising.
https://techcrunch.com/2016/09/19/go...-to-read-next/