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I'm sorry, I haven't read 'canal de la reina full novel' so I can't directly recommend reviews. But you can try searching on book review websites like Goodreads or Amazon. There might be readers who have shared their thoughts on it.
In the Hollow Knight story, which is centered around the desolate and mysterious world of Hallownest, there are no obvious references to a 'familiar zero'. The game focuses on themes of sacrifice, decay, and the struggle between light and dark. There are bugs with different abilities and backstories, but this 'familiar zero' seems not to be part of the main narrative as far as I know.