Haganai
The first "Boku wa Tomodachi ga Sukunai" manga series, written and illustrated by Itachi, has been published in Media Factory's "Monthly Comic Alive" magazine since its May 2010 issue, released on March 27, 2010. Additionally, the series has been collected in 14 "tankōbon" volumes. Seven Seas Entertainment has licensed the first manga series in North America under the title "Haganai: I Don't Have Many Friends".
Tokumei Kakarichō Tadano Hitoshi
There are two series: "Tokumei Kakarichō Tadano Hitoshi" (9 volumes, or tankōbon, published from December 14, 2000 to June 15, 2001) and "Shin Tokumei Kakarichō Tadano Hitoshi" (20 volumes, published from May 27, 2002 to October 25, 2007). They were published by Kadokawa Shoten and Bunkasha, and were serialized in "Weekly Gendai", a weekly manga magazine targeting salarymen.