What is the summary for the book double take by carolyn keene?

"Double Take" by Carolyn Keene is a mystery novel featuring the iconic teenage sleuth Nancy Drew. In this story, Nancy discovers a look-alike of her friend, which leads her to investigate a series of strange occurrences and potential dangers surrounding the doppelgänger. As Nancy delves deeper, she uncovers a tangled web of secrets and deception, ultimately putting her detective skills to the test. The novel combines suspense with themes of identity and friendship, showcasing Nancy's resourcefulness and determination.