I would highly recommend Leitch's study, in particular for its diversity and complexity. The author demonstrates that he is familiar with a large and heterogeneous corpus, including canonical as well as popular or marginal films and texts, which adaptation studies can only benefit from.
Acknowledgments
1. Literature versus Literacy
2. One-Reel Epics
3. The Word Made Film
4. Entry-Level Dickens
5. Between Adaptation and Allusion
6. Exceptional Fidelity
7. Traditions of Quality
8. Streaming Pictures
9. The Hero with a Hundred Faces
10. The Adapter as Auteur
11. Postliterary Adaptation
12. Based on a True Story
Notes
Bibliography
Index