Can you recommend some 'secret street novel'?

It depends on the specific circumstances and characters in the novel. Sometimes secrets are well-kept, while in other cases, they get revealed.

I'm not sure which specific '42nd street novel' you are referring to. There could be many novels related to 42nd Street in some way. You might try looking for novels that are set on 42nd Street in New York, perhaps some that deal with the theater district there, like stories about the performers, the backstage drama, and the life around that famous street.

A 'secret street novel' often has a sense of mystery. For example, the characters may have hidden identities or motives that are gradually revealed as the story unfolds in the street settings.

Another 'secret novel' might be 'The Da Vinci Code'. It involves a lot of secrets, mysteries and codes that the main characters have to decipher. The story takes the readers on a journey full of twists and turns as they uncover the secrets hidden within art, history and religious institutions.

Another one might be 'A Tree Grows in Brooklyn'. It delves into the lives of the characters in the back streets of Brooklyn. It portrays the hardships, dreams, and relationships of the people living in that area in a very vivid and engaging way. The story is rich with details about the daily life, poverty, and the strength of the human spirit in that back street environment.

I think it could be suitable for some young readers. The story is engaging and the writing is accessible. However, parents should probably read it first or at least be aware of the content. There are some scenes that might be a bit scary for younger kids, but overall it has a good message about facing your fears.

Some gothic novels can also be considered in this category. They typically have elements like dark secrets, hidden pasts, and sins that are lurking beneath the surface. Novels like 'Wuthering Heights' by Emily Bronte, with its complex characters and their troubled relationships filled with unspoken secrets and actions that could be seen as sins in the context of the story.

There is also 'The Hating Game'. While not strictly a traditional 'secret admirer' story at first glance, there are elements of hidden feelings and admiration between the two main characters that gradually unfold as the story progresses, making it an interesting read in the context of secret emotions.

Another 'secret code novel' could be 'Cipher' by Klaus Koch. It delves deep into the world of codes and cryptography. The story is filled with suspense as the characters try to break and understand various ciphers, and it also touches on the implications of code - breaking in different contexts.

One popular 'secret order novel' could be 'The Da Vinci Code'. It involves a lot of mystery and secrets within religious and historical orders.