Are there any books about free indirect speech regarding Jane Austens novel Pride and Predudice?
If you have access to a university database, the best place to find scholarly works on literature is MLA Bibliography. Then, you can do an interlibrary loan if your institution doesn’t have it. It includes scholarly journal articles, and you are more likely to find this kind of information in one of those. Try experimenting with search terms, too. I had trouble finding anything for “free indirect speech” in Pride and Prejudice, but you could try just Austen or something like that. If you already have sources, look in their bibliographies–this is probably the best way to find good info.