Нэнси Дрю и ключ к шифру

The puzzle element adds a fun twist, but I'm curious if the author was influenced by real cipher challenges or classic detective stories.

Their teamwork and playful banter made the story really engaging. I wonder if the author drew from personal experiences or observations.

Sometimes mysteries focus too much on plot, but here the characters felt well-rounded. Was that a conscious decision or did it evolve naturally?