Middle Grade Fantasy. Girl is being haunted. There are eels, plot involves an Ouroboros (circular symbol of snake swallowing its tail). Girl doesn't like step dad, mom got pregnant accidentally with her. Read 2009-2012.

[Gigi]

Girl's Mom got accidentally pregnant with the girl. And the girl doesn't like her step dad. They moved and now the girl is being haunted. Setting is UK (or vaguely UK). There are eels, and the plot centers around an Ouroboros.

[Becca]

Roughly what year / decade did you read it?

[Gigi]

Between 2009-2012

[Gigi]

I believe the cover was white with an Ouroboros but I am not confident.

[Capn]

There's an Ouroboros cover list:
https://www.goodreads.com/list/show/1...

Anything there?

[Kris]

Gigi, I copied some details to the topic header. Feel free to edit it.

[Gigi]

Kris wrote: "Gigi, I copied some details to the topic header. Feel free to edit it." Thanks Kris!