Beginning we ought to first understand who an antagonist Is in a story or a book, First of an antagonist us someone who opposes the protagonist in a given movie, book or story, the antagonist tries his possible best to stop the protagonist from achieving their goals. With knowing about who and antagonist is we can go ahead, of course a book can be written without an antagonist in it , infact many books have been written without a traditional antagonist. Usually in this books the conflict is always likely internal and not external, the protagonist might be struggling with his or her own demons rather than fighting against an antagonist.
Thier are many examples of books which have been written without an antagonist such as in The Alchemist by <PERSON>, Here the story follows an animal caretaker know as shepherd, this shepherd name is <PERSON>. 190
<PERSON> was on the road to find a treasure that was buried near an ancient pyramid of Egypt, during his journey he met different types of people who where ready to help him realize who he really was an to also help in his journey to search for the treasure.
Another interesting book is the Road by <PERSON>, Here the story starts up showing 2 people, a father and the son as they travel through a trying times of post apocalyptic landscape, In this story the write-up is a little bit different from others, Here the father and son are fighting the harsh environment and their inner demons in order for both of them to survive.
In all the antagonist doesn't really have to be a person it can be an idea or some fact or even the protagonist self doubt which hints him. Books without an antagonist are books which are really worth reading and it's compelling when been read , this types of books ends up helping out by making them face they worst fear or inner demons. I would say that a book written without an antagonist is an apealing book which should be read everyone who usually have doubt in their mind or those who can really face their demons alone. 190