Breakdown of Esa novela es un reto para ella, pero su progreso es rápido.
Questions & Answers about Esa novela es un reto para ella, pero su progreso es rápido.
Both are correct, but they point to different “distances”:
- esta novela = this novel (physically close, or very present in the conversation / time)
- esa novela = that novel (a bit more “distant”, maybe the one over there, or one we talked about earlier)
In Latin American Spanish, esa is often used for something that is not right here, but not very far away either, or just previously mentioned in context. The speaker is probably talking about a specific novel they both know about, but it’s not “right here” in focus.
- novela = novel (a specific type of book: a long fictional story)
- libro = book (any kind of book: textbook, notebook, novel, etc.)
So esa novela means that novel (specifically a work of fiction), not just any book.