Well, it's nice because Akin is only in one book of three -- the first one is pretty much 'how Mom became a traitor to the human race' and the third one is about Akin's much younger half*-siblings and Biblical metaphors I missed in the first reading, because I'm dense like that**. And it's still only three books (that nowadays are sold as an omnibus)

But Octavia Butler writes interesting aliens.

* Well, three-quarters-siblings, technically. They share all the same parents but one.
** I totally did get that Butler named Akin's mom Lilith as a reference to the mythological Lilith as the mother of monsters. (Don't tell him that...)