I am always on the hunt for books that might appeal to those Percy Jackson fans... and this one caught my eye because it was about Indian mythology (and had a cover that suggested there might be some good action).

Ash Mistry is visiting his aunt and uncle in India, when his uncle takes on the job of translating some pictograms for the mysterious Lord Alexander Savage. Ash is immediately suspicious of the large payment offered for the job and the creepy appearance of Lord Savage and his employees. Somehow they seem to resemble reptiles and dangerous predators a little too much...

Ash is at an archeological site near Lord Savage's home when the ground suddenly gives way and he falls into an undiscovered area under the site. He accidentally pricks himself on a golden arrowhead, which leaves a sliver in his finger, and begins to see visions of the battle against the evil demon king Ravana. It turns out that Lord Savage is indeed an evil bad guy who wants to release the demon Ravana so that he can become immortal.... and the golden arrowhead is exactly the thing he is looking for. Unfortunately Ash and his sister become the primary target for Lord Savage and his employees -- who are really demons in disguise. 

With the world at risk of being overrun by murderous demons, Ash needs to find a way to stop Lord Savage. This means battling giant birds, monstrous reptiles and shape shifting wolves. 

I liked the action and pace of the plot and definitely found bits about Indian mythology intriguing. I do think the gods/demons will interest many Percy Jackson fans. I don't find the conversation and characters to be as humorous as the ones in Rick Riordan's books but there are some witty comments that give the characters distinct voices and keep the tone of the book light. The whole thing about incarnation added an interesting layer to the plot, but I felt it could have the potential to become a bit of a cop out where it doesn't matter if characters die because they'll come back to life later anyway.

This is more suited for preteens (pretty much the same audience for the Percy Jackson series). Visit the Ash Mistry blog for character profiles, info on Indian Mythology, book excerpts and activity sheets. And yes, there is a sequel: Ash Mistry and the City of Death.

How far would you go to save someone you love?  Victor Frankenstein finds out when his twin brother Konrad is on his death's bed and no one can figure out why he is sick. Stumbling across a secret library in his mansion, he discovers his family's dark secret and dabbles in alchemy to make the Elixir of Life to cure his brother. Will he succeed?
Incidentally, CBC Books had a "Kelley Armstrong recommends" column the other day and she reviewed this book. She said, "It help fills a void in the girl-dominated young adult market by telling a story that should be an easier sell to boys, while still appealing to girls." She's right about the girl-dominated part (and I don't know why people still argue that YA lit serves male and female readers equally), but to me, this book is more like, "well, girls will like this, and boys may read it too". I don't think this book has "it".  It has potential for sure, and when I first read about the plot, I was excited too to meet the twins, but the story moves too slowly, and it feels like forever in between the scenes that have stuff happening. Those rare scenes, exciting as they may be, are not enough to hold my interest. I also don't care much for the characters. The love triangle is particularly irritating, not to mention that both guys seem a bit wishy-washy compared to Elizabeth, the fiesty cousin that they're both in love with, which bugs me 'cause males need strong characters and models too.  I remember being fascinated by the real Frankenstein when I finally read it years ago, but I find Oppel's prequel lacking in all the delicious details. Feels like everything is saved for some sort of sequel.
For a much better portrayal of a pair of brothers trying to create life and living with the consequences of playing god, try the manga Fullmetal Alchemist by Hiromu Arakawa.