I finished Death Note: Another Note.
It had a good twist at the end and was an enjoyable read but it had a few issues. The first was that the author seemingly didn't pay much attention to the manga. I say that because humans cannot work out how long another human has to live based on the numbers they see with shinigami's eyes -- only shinigami themselves can put the numbers together and work out how much life a person has left. The second flaw is a continuation of the first flaw. As well as wrongly explaininghow someone with shinigami's eyes can see when someone will die, the author suggested it's easier to kill people who are nearing death, using some sort of foreign logic to inform readers that B.B. could kill people without a struggle for that very reason. I fail to see how someone is easier to kill an hour before they're meant to die naturally as a result of murder or some freak accident?
Another issue I had was with B.B.'s character. One minute he was an insane bad guy, doing the whole evil laughter thing and dancing in the blood of sheep, and the next he was a clone of another, totally different character. And putting aside my annoyance over his copy and paste and standard issue insane baddie personalities, I can't quite work out how managed to become a clone of someone who, as far as I'm aware, he never met. If he had met him then he would've known the real name of the person he was copying.
I did, however, enjoy reading the story quite a bit. If I allowed myself to forget what I know about the real Death Note and view it as fan fiction, which is what it is when it comes down to it, I was able to derive a fair amount of enjoyment out of reading the novel. The entire book is basically fan service for Death Note fans, so if you go into it not expecting 10/10 entertainment then the experience will be much more enjoyable. Its story puts two characters who were wasted in the proper Death Note (Mello and Naomi), puts the most loved character into the mix (L) and attempts to develop the characters (mainly Naomi) where possible.
I'm going to re-read it again at some point because of the twist at the end. Although I should've picked up the hints given by the word "misdirection" popping up a lot before the end, I wasn't expecting the author to pull the twist he did out of the bag.