Philadelphia Eagles star wide receiver A.J. Brown was caught in his Zen. He was spotted on camera reading "Inner Excellence" by Jim Murphy in the fourth quarter of the 22-10 wild-card playoff victory over the Green Bay Packers,

When A.J. Brown’s head wasn’t in the Philadelphia Eagles’ wild-card playoff game Sunday, his nose was buried in a book.

The wide receiver said the book, which provides mental techniques to improve lives, brings him a 'sense of peace.'

Hours after the Eagles receiver was spotted reading Inner Excellence by Jim Brown on the sideline of the team's playoff win over the Green Bay Packers on Sunday, fans made the book the number one best seller on Amazon.

WATCH: A.J. Brown did some light reading of a book called Inner Excellence on Eagles sidelines during wild card game vs. the Packers

And that’s poetic justice, especially in the playoffs. And here, Eagles coach Nick Sirianni went on sort of a James Joyce stream of consciousness to explain, essentially, that Hurts makes the plays that he needs to make without turning the ball over.

While Tom Brady and author Jim Murphy were surprised to see Brown reading the book on the bench, the wide receiver said he brings it to every game.

The book Philadelphia Eagles star wide receiver A.J. Brown was seen reading rocketed to the top of Amazon's bestsellers list on Monday morning.

Philadelphia Eagles star receiver A.J. Brown could launch a book club of his own after a little sideline reading skyrocketed self-help author Jim Murphy to the hottest seller on Amazon overnight.