Many modern adult book series are six hundred pages or more for a single installment with about four hundred words a page versus the maybe hundred and fifty of a children's book like Goosebumps. Since it's three to four times the text that makes thirty pages thirty minutes actually viable as a self challenge even as an adult.
Just finished up my second re-read of an unfinished book that kinda ruined most entertainment for me by setting the bar too high. I now have to make the difficult decision to either be disappointed by another novel or to just read this one yet again.
Usually I find it a bit tough to finish books and I never re-read anything in my life before for entertainment.
So if it is a bit tough, probably the book is just not good enough for you.
https://www.webnovel.com/book/reverend-insanity_799685840600...
There is a good book "The science of storytelling" (Will Storr) which points out the techniques used by famous stories. Those techniques allow the reader to be more invested in the story.
Dungeon Crawler Carl for example uses some of the techniques (intentional or not).
As a voracious reader, I both agree and disagree with this.
There are some books that simply take too long to come to the point. I'm reading an ARC of a dark academia that's highly rated. I'm 60% in and I haven't yet gotten interested in it. I read entire "Billy Summers" in 2 days by halting the previous book's read. So yeah, the onus is also on the author to make the book interesting
Full disclosure: I am not a tiktok or reel addict. I've read 65 books last year, currently on my 45th book of 2026. I love long books.