I came to read Toki wo Kakeru Shoujo, or as it's officially translated, "The Girl Who Leapt Through Time", after first watching part of the (loose) anime adaptation in class and then viewing the book's film sequel (free on Amazon Prime!). I actually liked the sequel; it had a great storyline and really made you think after viewing it. The main ideas of the original story (or specifically, the original film adaptation from the 1980s) are recapped in this one (the protagonist learns about her mother Kazuko's past), but I want to see the source material.
I know this may seem a little negative, but my studies involve analyzing text for meaning through word choice, sentence structure, etc., so I was happy to read a book that was geared toward a younger audience so I'd just be able to take in the story without much thought. It reads very easily; one reviewer of the book mentioned that its second half was better written (or translated) that the first, but both are extremely simple forms of writing. Was this the work of the translator, or was this written simply for junior high students...?
You may have read that last sentence and thought, "Wait! There's a 'second part'?" The first half of the text is in fact the story of the girl who leapt through time, but the second half is an entirely different story about a girl who explores her fears and tries to learn their origins. Thinking that I'd read a final chapter where the two protagonist girls came together, I was a little let down that the stores were not connected. Other than them both dealing somewhat with time (Kazuko and her time leaping and Masako and learning about her past), these stories are unrelated.
I don't know why two short stories are included or why the second one isn't mentioned in the description, but the reader should know when the story ends so as to not form expectations like I did. Overall, this was a fun reading, something I finished in probably less than two hours while commuting to school.
If you have seen the anime or any of the other adaptations, I suggest you read this! Even if it isn't the most scholarly thing to look at, you are still seeing where these films came from. I enjoyed it, and so will you. Once you have read it, check out the other films, too! It can be a great experience comparing them all!