Heaven's Memo Pad

is a Japanese light novel series written by Hikaru Sugii, with illustrations by Mel Kishida. ASCII Media Works published nine volumes between January 2007 and September 2014 under their Dengeki Bunko imprint. A manga adaptation illustrated by Tiv was serialized between the August 2010 and September 2012 issues of ASCII Media Works' Dengeki Daioh magazine. An anime adaptation aired 12 episodes in Japan between July and September 2011.

Plot
The story centers around Narumi Fujishima, the main protagonist. He is a high school student who is not very involved in his school whatsoever to the point where he does not know most of his classmate's names. However, in a solve crimes and murders using their limited resources and Alice's genius intellect.

Other Sources

 * Wikipedia