What is the project detail for the project with document "King Book"?
SELECT T1.project_details FROM Projects AS T1 JOIN Documents AS T2 ON T1.project_id   =   T2.project_id WHERE T2.document_name   =   "King Book"
project detail refers to project_details; project with document \"King Book\" refers to filtering rows where document_name = \"King Book\"; JOIN operation is used to combine rows from Projects and Documents tables based on a related column between them, which is project_id.