addiction to reading; reading addict; obsessive reader
A playful or self-deprecating term for someone who reads compulsively, often used in casual contexts. Can refer to the condition or the person.
He's a reading addict; he reads books even during his commute.
活字中毒の私は、本屋に入ると何時間でも過ごしてしまう。
As an obsessive reader, I end up spending hours in bookstores.