Example: Anna Karenina. Gripping from the opening line (if you like the type of novel that it is; and it's fine if you don't, of course).
Or alternatively, Pride and Prejudice. Again, that opener just sucks you in (if this is a book for you, that is; and again, if it's not -- totally fine).
Example of a modern page-turner: The Hunger Games. If you are bored with this novel after three pages, you shouldn't read any further, because it's absolutely, certainly, not for you.
Or, Jeebus, Harry-Freaking-Potter. There is a reason that an entire generation grew up reading those books.
Or: "The Time Traveller's Wife", "The Poisonwood Bible", "The Road", "Interview with the Vampire", "A Room with a View", "Replay", "Of Mice and Men", "Brave New World". The list of books that are gripping from the start, should they appeal to you, can be almost endless.
Basically, if you and your book align (ugh, sorry), then there generally shouldn't be any form of "volta" (really, ugh).
There are many novels that are boring to me. I've never finished those; I discard and move on to the next one, where the author knew how to write something that isn't boring to me. Someone else might love them, and many people clearly do, but they're not for me.
Why do so many people assume that everyone will love the exact same books, and that if you're bored by a book you just have to work at it some more? Life is too short for that nonsense.