My daughter ran into this also. AR points are important to them and "getting their points" should be encouraged - otherwise when they get older, you will be in huge fights with your child to complete work.
However, going to the public library and checking out real reading material is great.
There are ways to accomplish both goals - if you child is a reader.
My daughter's Lexile scores were so high in sixth grade that there were absolutely no books in the library for her. I asked that she is able to read what the other students are reading in order to be able to discuss books with other students. Otherwise, she had to read only textbooks.
There is just a point where a student can read almost anything and other ideas have to be considered.
