This is the only memoir that I can find re the regiment.

46th Mississippi, "Blood and Sacrifice: The Civil War Journal of a Confederate Soldier, Company B, 46th Mississippi Volunteers," by William Pitt Chambers. Edited by Richard A. Baumgartner. Roster, this 281 page 1993 issue costs around $ 22.00.

Here is an interesting site: http://www.gwest.org/46thmsin.htm