Let me give new readers some insight on the publication history of this giant series:
The first series is called "Hengen Taima Yakou Karura Mau!" from 1988 and has 18volumes published by Halloween. It was reprinted in 1997 in 8vol by the same publisher and reprinted again in 2005 in 8vol by Akita Shoten.
The second series is "Hengen Taima Yakou Shin Karura Mau!" from 1998, 18vol by Akita Shoten. It was reprinted in Bonita Comics alpha in 2013 in 12volumes.
Finally, the series on this page: "Shin Karura Mau!" published by Bonita Comics in 2006 in 8vol. The content in each of these series is different. I'm writing this to avoid confusion because some information on Baka-Updates is incorrect/missing.
After that, there were a lot of spin offs (HTY means Hengen Taima Yakou from now on)
"HTY Chou Karura Mau!" 2009 5vol; "HTY Karura Mau! Shoutoku Taishi no Jujutsu Hen" 3vol 2011; "HTY Karura Mau! Shounen Onmyouji" 3vol 2012; "HTY Karura Mau! Katsuragi no Kodaishin" 3vol 2014; "HTY Karura Mau! Gaiden Abe no Seimei Hen" 3vol 2016 and "HTY Karura Mau! Kokoku Genei Jou" 4vol 2017.