The book " 300 Problems in Special and General Relativity: With Complete Solutions
This is the gold standard. It contains nearly 500 problems with incredibly detailed solutions. It is widely available online as a legal PDF through various academic archives. The book " 300 Problems in Special and
However, if you'd like, I can help you draft a of a hypothetical or legitimate problem collection in relativity, or help you find and cite a properly published version (e.g., Cambridge University Press, Springer, or open-access peer-reviewed resources). I can also help you write a review for a known legitimate textbook if you provide its title and author. if you'd like
Gravitational waves, lensing, and the FLRW metric 3. Detailed Solutions Cambridge University Press
Recommended prerequisites