I haven't come across any official or widely recognized book titled 'Harry Potter and the Shadowed Light'. It might be fan fiction, which is super common in the Harry Potter fandom—there are thousands of stories exploring alternate universes, untold backstories, or even entirely new adventures. Some fanfics dive into darker themes, like what if Harry had a hidden power or if the wizarding world had a secret history. The title 'Shadowed Light' sounds like it could be about Harry grappling with a morally ambiguous ability or uncovering some forgotten magic.
If it's a fanfic, the plot could go anywhere! Maybe it's a 'what if' scenario where Harry discovers a lost branch of magic tied to shadows, or perhaps it's a darker take on his relationship with Voldemort. Fanfics often play with the idea of gray morality, so 'Shadowed Light' might refer to Harry walking a fine line between light and dark magic. I love how creative the fandom gets—some stories feel like they could be official spin-offs. If you've read it, I'd totally be curious to hear what it's about!