Null Set

Tor. (Cas Russell, Bk. 2). Jul. 2019. 320p. ISBN 9781250180308. $27.99; ebk. ISBN 9781250180315. SF
In Zero Sum Game, Cas Russell was able to take out Pithica, the organization of telepaths trying to create a better world through their control, but now the crime rate is spiking and Cas feels responsible. So, why not take on the crime organizations that are ramping up in Los Angeles? Especially since Cas’s own mathematical abilities make her nearly superpowered. Except that Cas knows that her last battle with Pithica cracked open a secret in her memory, one she will have to fight for and against as it begins to affect her mind. Now she’s on everyone’s hit list and unsure of her own stability, whom will she trust when her world is crumbling? Zooming from external to internal conflict, Cas struggles with the choices she’s made for the rest of the world, knowing that she may have no choice but to do that again.
VERDICT Huang’s sophomore novel brings us the same tight action, compelling characters, and mathematics magic as Zero Sum Game. Fans of the TV series Jessica Jones will enjoy meeting Cas.

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