Where lies the strangling fruit that came from the hand of the sinner I shall bring forth the seeds of the dead to share with the worms that gather in the darkness and surround the world with the power of their lives while from the dim lit halls of other places forms that never were and never could be writhe for the impatience of the few who never saw what could have been.

Annihilation — creepy, well-written sci-fi/horror. A lot of questions raised.

Authority — boring, still well-written. Switches the setting from Area X to the Southern Reach, the organization looking over Area X. Raises more questions.

Acceptance — overly written, goes nowhere, answers nothing.

Read the first, skip the other two. There is no reason to read the next two books, especially if you think a trilogy might tell a complete story.