There are 500 sargas (cantos) in Valmiki Ramayana. They are divided into seven books consisting 24000 slokas(verses) in all.
There are 24000 shlokas in the Sanskrit epic Ramayana. Valmiki wrote the story of Rama as Ramayana.
Valmiki was the writer
Hindu sage Valmiki.
Valmiki Wrote Ramayana. He is an author.
The author of the book ramayana was Valmiki.
Sage Valmiki
Narada
Valmiki is the original author of Ramayana. He wrote it in Sanskrit language.
'Ramayana' is an epic written by Valmiki, based on historical facts.
Saint Valmiki was the original writer of Ramayana. He wrote it in sanskrit.
There is a page on Ahiravana in Wikipedia. Stories in many versions of Ramayana vary from those in Valmiki's Ramayana. At places, even Tulsi's Rama Charit Manas, is different. I did not find the story of Ahiravana in Valmiki's Ramayana. But that does not nullify the story. The story of Lava and Kush also does not find any mention in Valmiki's Ramayana. We say 'Hari Ananta, Hari Katha Ananta' (The stories of Lord are as unlimited as the Lord himself).
There is a page on Ahiravana in Wikipedia. Stories in many versions of Ramayana vary from those in Valmiki's Ramayana. At places, even Tulsi's Rama Charit Manas, is different. I did not find the story of Ahiravana in Valmiki's Ramayana. But that does not nullify the story. The story of Lava and Kush also does not find any mention in Valmiki's Ramayana. We say 'Hari Ananta, Hari Katha Ananta' (The stories of Lord are as unlimited as the Lord himself).