Philosophy is a subject that requires critical thinking and analytical skills. Optional case studies for Philosophy can be beneficial in developing these skills and applying philosophical concepts to real-life situations. Here are some recommended books and sources for Philosophy Optional case studies:

1. "Ethics: Case Studies" by David C. Thomasma:
- This book provides a collection of case studies that cover a wide range of ethical issues.
- Each case study presents a moral dilemma and explores various ethical theories and principles that can be applied to analyze and resolve the dilemma.
- It helps in understanding the application of ethical concepts in practical situations.

2. "Philosophy: The Power of Ideas" by Brooke Noel Moore and Kenneth Bruder:
- This book offers case studies in various branches of philosophy, including ethics, epistemology, metaphysics, and social and political philosophy.
- The case studies are designed to stimulate critical thinking and encourage students to apply philosophical theories to contemporary issues.
- It provides an excellent resource for developing a deeper understanding of philosophical concepts through practical examples.

3. Journals and Academic Publications:
- Academic journals such as "Philosophy and Public Affairs," "Ethics," and "Journal of Applied Philosophy" regularly publish case studies that explore philosophical concepts in real-life contexts.
- These case studies are often written by experts in the field and provide in-depth analysis and discussion of ethical, moral, and social issues.
- Reading these case studies can enhance one's understanding of how philosophical principles are relevant and applicable in the modern world.

4. Online Philosophy Forums and Discussion Boards:
- Participating in online philosophy forums and discussion boards can provide access to a wide range of case studies and real-life scenarios.
- Websites like EduRev have dedicated sections for Philosophy Optional where students can share and discuss case studies, ask questions, and engage in philosophical debates.
- These platforms offer opportunities to learn from others, gain different perspectives, and apply philosophical theories to practical situations.

In conclusion, books like "Ethics: Case Studies" by David C. Thomasma and "Philosophy: The Power of Ideas" by Brooke Noel Moore and Kenneth Bruder, academic journals, and online philosophy forums are recommended sources for Philosophy Optional case studies. These resources offer a rich collection of case studies that can help develop critical thinking skills and apply philosophical concepts to real-life scenarios.