Teppei Sasaki is a wannabe mangaka who just can't create a hit. Actually, forget a hit, he can't even land a series. All of his attempts to create manga are bland and unoriginal, quickly rejected by his editor, but when lightning strikes his house one night, he winds up with a copy of Shonen Jump from the future, in which a series called White Knight started. He reads it, decides it's a gift from the heavens that's better than any other manga is or ever could be, and then when the Shonen Jump issue disappears, assumes it came from his brain and redraws the chapter. When he submits it to Jump, it's quickly serialized, but when the original creator Aino becomes his assistant, Sasaki has to face his guilt for stealing the series.
First things first- Time Paradox Ghostwriter is a series that deals with plagiarism. This was not received well in Japan, even though the manga doesn't attempt to pretend plagiarism is acceptable and is actually about Sasaki grappling with the guilt of having plagiarized. I've seen the argument that the manga attempts to excuse plagiarism, but I believe that's just a stupid take. Sasaki is constantly beating himself up for stealing Aino's work and feeling like he needs to do the best he can to try and not demean the series, to the point where despite major debts he refuses to use the money he got for White Knight. If anything, he tries to make up for plagiarizing rather than pretending it was acceptable.
Time Paradox Ghostwriter deserves to be commended for a few unique aspects. First off, the main character is not a youthful, happy-go-lucky dude like a lot of Jump series. He's still young, but he's been very much beat down by failing so often, and he's not talented. Second, the series does its best not to step on Bakuman's toes and really feels like the author wanted to create something unique. This may've been an unfortunate decision, which I'll touch on in a bit. Third, the art is pretty good. It's not unique and it's not anything crazy, but it looks nice.
The main plus for TPGW is that, even though the author seems to have realized they'd be quickly axed as early as the sixth chapter, they did an incredibly good job wrapping up the story with what time remained. All of the fluff that dominates the first few chapters is tossed out the window in favor of a brilliant wrap-up on the character arcs of both Sasaki and Aino and answers to why future Shonen Jump copies were popping up to begin with. I've read quite a few axed manga, and the ending arc for Time Paradox Ghostwriter is the best ending of any of them. I'm trying not to spoil the series, but Sasaki trying to atone in a way is actually pretty touching to watch- in fact, the series is quite touching overall. Despite being largely about Sasaki trying to atone for plagiarizing White Knight, TPGW is a weirdly wholesome story, and the characters have a very youthful, shonen feel to them.
Now for the issues with the story. I mentioned earlier that the series seems to be trying not to imitate Bakuman, and that means that in the early chapters, when it's focused on manga creation, it really doesn't touch the survey system, one-shots, relationships with editors, the difficulties of serialization, the mangakas trying to improve, or anything of that nature. Unfortunately, that means that the chapters that I believe came before the author realized they'd likely be axed are pretty forgettable and just full of Sasaki trying to come to terms with Aino being his assistant and having derailed her future as a manga artist, to the point I don't think the series could have had enough content to go for long even if it wasn't axed. It's also of course a pretty controversial idea to make a series with plagiarism as its theme, as most people are definitely not okay with that, even if the series doesn't endorse it.
All in all, TPGW is an incredibly neat story for one that got axed. Despite a rough initial few chapters and an interesting relationship with plagiarism, the ending was incredible for an axed story and the characters actually felt like they grew. I highly recommend the series.