What did the court decide in Lewis v. Casey?
Answered for: US
Bounds did not create an abstract, freestanding right to a law library or legal assistance
The Court narrowed Bounds, requiring a prisoner to show actual injury to a nonfrivolous legal claim rather than a library deficiency alone. The sentence above is the court in its own words.
This answer is true in US and nowhere else on this site. Another jurisdiction is another answer, or an honest gap: see what has been read for US.