Which Hercule Poirot books are most deserving of a read instead of a watch?

I'll explain my question: I have seen my mother watch David Suchet's interpretation of Poirot a few times in my childhood and I've always enjoyed watching it with her. As someone who likes mysteries, and who can't remember any of the Poirot plots I've seen, I would like to watch the series.

I have already started, and have so far seen the first 4 episodes of the first season.

But I am also aware that Agatha Christie's writing is renowned and that she uses narrative tricks in her books (something rarely seen before her, if I'm not mistaken). Despite not being much of a reader, I am a fan of mysteries and am very interested in seeing/experiencing/understanding for myself the tricks she uses in her books, which may not have been adapted well in the TV adaptation (or maybe they are! I do not know).

Which is why, before watching the entire series, I would like to ask: if I wanted to read, let's say a maximum of 8 of her Poirot books, which ones would be the most deserving of a read? I am looking for those that are either great stories (maybe they will be even greater in book form) or make great use of the narrative tricks Agatha Christie is known for.

There are already two that I know I want to read: "The murder of Roger Ackroyd" and "The ABC murders".

I will still watch the corresponding episodes but i will skip them until i've read the books.

Thanks in advance!