Finding previous years papers of UPSC Law Optional subject for both Paper 1 and Paper 2 in one book can be a challenging task. However, there are certain resources available that can help you in this regard.

One such resource is the EduRev website, which provides a wide range of study material, including previous years' papers for various UPSC optional subjects. Here's how you can find the previous years papers of UPSC Law Optional subject for both Paper 1 and Paper 2 on EduRev:

1. Go to the EduRev website: Start by visiting the EduRev website (www.edurev.in) on your web browser.

2. Search for the Law Optional subject: Use the search bar on the website to find the Law Optional subject. Type "UPSC Law Optional" in the search bar and press enter.

3. Explore the Law Optional subject page: Click on the Law Optional subject from the search results to access the subject page. Here, you will find a collection of study material related to UPSC Law Optional.

4. Look for previous years papers: On the Law Optional subject page, you will find various categories of study material. Look for the category that specifically mentions previous years papers or question papers.

5. Select the relevant papers: Once you find the category of previous years papers, click on it to open the collection. Here, you will find a list of papers from different years. Look for the papers labeled as "Paper 1" and "Paper 2" to find the specific papers you are looking for.

6. Download or access the papers: You can either download the papers in PDF format or access them online, depending on the options provided by EduRev. Choose the preferred method and start accessing the papers.

By following these steps on the EduRev website, you can find previous years papers of UPSC Law Optional subject for both Paper 1 and Paper 2 in one book-like format. Remember to explore the website thoroughly to make the most of the available study material.