If Voldemort reads Harry Potter books fanfiction, it could be really strange. He might get angry as the fanfiction could portray him in ways he doesn't like. Maybe he'd see himself being defeated in new and creative ways that would irritate his pride. He could also gain some new, unexpected insights about the wizarding world from the different perspectives in the fanfiction, which could either make him more dangerous or, if he overthinks it, cause him some confusion.
One great fanfiction could be 'The Prankster's Plot Against the Dark Lord'. In it, Harry uses a series of clever magical pranks, like turning Voldemort's wand into a rubber chicken for a short while during a battle. It adds a touch of humor to the dark and dangerous world of Harry Potter and Voldemort's enmity.
A lot of these fanfictions play around with the idea of changing destiny. In many of them, when Harry and Voldemort meet during time travel, they end up having to work together to fix some sort of magical catastrophe that their future selves created. This often leads to some very strange and unexpected alliances between the two arch - enemies.
It's possible. In the realm of fanfiction, the imagination knows no bounds. Writers might come up with such a scenario for various reasons, perhaps to explore a different side of the characters' relationships. But it's not a common or mainstream concept within the Harry Potter fanfiction community, as it goes against the typical character dynamics we expect from the series.
In many fanfictions, Harry Potter squinting at Voldemort could be a sign of intense focus. It might be that Harry is trying to read Voldemort's next move, or perhaps he's looking for some sign of weakness. For example, in some stories, Harry's squinting could be related to his newfound magical abilities that he's using to analyze Voldemort's magic signature.
Reading fanfiction can keep your love for the Harry Potter world alive. If you've already read the books multiple times, fanfiction offers new stories set in that familiar universe. It can be exciting to see how different authors imagine the continuation or alteration of the story.
One popular theme is 'what - if' scenarios. For example, what if Harry had been sorted into Slytherin. Another is time - travel, where characters go back in time to change events.
In this fanfiction, it could be that Voldemort has a premonition. He sees that if Harry Potter dies, it will lead to a series of disasters that will also destroy his own plans. So, in order to preserve the balance or to keep his long - term goals intact, he saves Harry. For example, if Harry's death causes an uncontrollable chaos in the wizarding world, Voldemort's rule over the dark forces might be disrupted. So he steps in to save Harry.
He'd probably be furious. Voldemort has a huge ego and most fanfiction would likely not portray him in the way he sees himself. He might view it as a form of disrespect to his 'true' nature and power.
I'm sorry I can't directly recommend specific voldemort reads the books fanfiction as there are so many out there. But you can start by looking on popular fanfiction websites like Archive of Our Own and search for relevant tags.