Oh, being an anime fan of course I would set my eyes on this one. It's called Death Note: Another Note and it is a prequel to the popular manga storyline. Actually, it is effectively an elaboration of a murder mystery that came up in the manga series. A warning to all, the book probably makes sense only if you are either familiar with the DN series or are a huge fan of the main character. Fine, the story will make sense but you won't be as enthralled by the plot.
The story falls into the mystery genre where folks are trying to uncover the truth behind some horrid murders. And of course the man of the hour is lovable L, the genius detective of the DN series. You also come across Masori Naomi, the brilliant mystery-solver from the series. She's the one who was killed in a bizarre manner by Light. Thus Death Note: Another Note covers the time when L and Masori knew each and were helping each other solve crimes.
Like I mentioned earlier, this novel is for DN fans. The true selling points of this book are its references to L's background, his personality and method of working. If you loved L and wanted to know more about him, this is the book for you. It's a cute little treat for fans. Don't get me wrong, the story is good in itself but possibly not the biggest bestseller out there. Speaking of DN fans, this book provides helpful little doorway into the detective system that L works under.