CAN I READ MANACLED IN CHRONOLOGICAL ORDER?
Yes! I actually highly recommend it if you're doing a reread, although I am told it is much more heartbreaking that way. I actually wrote the story intending for it to be read in either order (although I don't advise reading it chronologically the first time).
Just start with the Flashback chapters (Chapter 26-63) and then when you reach the end of them, jump back to Chapter 1 and read to Chapter 25, then skip to Chapter 64. All the flashback chapters are marked as flashbacks, so they're easy to find in the table of contents.