About the Special Situations category

Experts please help me with special situations on the following areas:

1. Which government website should be followed for demergers and other special situations?
2. Which part of the document/filing is the most important in the demerger scenario?
3. What do you typically look for in a demerger? Good as well bad?
4. Any book apart from Greenblatt for special situations or other blogs or books or YT channel?

Please do share your learnings.