I think the other posters have some good points. The truth is that there are many unfair sad things that go on in the world. Identifying with the sadness in the book you are reading can be a challenge as you discribing. However if this book gives you significant ways that can "enlighten" you where if inspite of the sadness the charectors find ways to overcome, that can help.

By seeing things that we can identify our own sadness with, and learning that we are not alone can help us connect to the world, verses trying to surpress our sadness. If we can connect with that, we can also connect with the healing that can take place, inspite of the life challenges that can be sad.

So when picking reading material, it is important to know if there is going to be exposure to "enlightenment", that is good. If not then it is better not to read something that will only serve to bring you down and aggrivate your depression.

Open Eyes