> Consider: the author has set himself to read 20 books per year. Suppose this is double of his standard. What he will do to fulfill his OKR? He's not going to choose a difficult read such as Ulysses, or an existential crisis inducing book such as Crime and Punishment, he will go for what is more superficial and easier to read, because his goal is not to be transformed by what he reads, his goal is to read 20 books.

The problem with this I see is the KR itself, not Objective. In 2019 I choose similar Objective which pushed me towards finishing books I didn't enjoy or valuable, so I decided to set the KR as number of pages read or just 30 minutes a day.