From Project Strikeout:
The story starts in Okinawa, in a training camp-- the ace batter of the Lycaons, a notoriously weak professional baseball team with a record of losses, Hiromichi Kojima, is trying to find out just why his team can never make it to the championships. During his training, he discovers the game of One Outs, a gambling derivative of baseball, and the game's champion, Toua Tokuchi.
The rule of the game is simple: if the pitcher can strike the batter out in three pitches, the pitcher wins.

No one had ever been able to get a hit from Toua.

This is the Lycaons' and Toua's fateful meeting, and it's here that the story begins

If you had a loved one killed by someone, could you allow that? Could you really trust today's judicial system? What would you do if you had the ability to punish people severely? From the author of Liar Game and One Outs comes a two-part one-shot about a judicial system for criminals that operates under the ideals of, "An eye for an eye".

(Source: Baka-Updates)

The story features the characters Mizuki Murata, who lost his emotions in a car accident, but in return gained an extremely good memory, and his rival Junbei Sonokawa.

Story of a buxom and no-nonsense crime-fighting mentalist.

Story of a buxom and no-nonsense crime-fighting mentalist.
(Source: MangaUpdates)

Congratulations! You are one of the 1 in 100,000 people who has been entered in the amazing LIAR GAME TOURNAMENT!

Along with the postcard there is 100 million yen in notes. That's the beginning of the Liar Game. When the game ends, in 30 days, you will have to return your 100 million. If your opponent steals them, he can keep them as a prize, and you will have a debt of 100 million...

Roots of A is essentially a manga short featuring Akiyama during his senior year of college. In it, Akiyama and four of his classmates are taking a criminal psychology course and given an assignment where they must construct a profile of a person based on a letter they sent. This outcome of the assignment, plus what the professor says afterwards, is what prompts Akiyama to enter grad-school and continue to study psychology.

[Side Story of "Liar Game"]