This page links you to the Collection of Free Marathi eBooks.
1. eSahitya Pratishthan - eSahitya is an online Marathi literature movement. They have published many free Marathi eBooks and eMagazines. Visit their website for the large collection of free eBooks.
2. archive.org - Visit this website for classic Marathi literature. This site offers books like Chhatrapati Shivaji Maharaj, Majhi Janmathep, Geeta Rahasya, etc. for free. Search for "Marathi" keyword in Texts category to access the treasure of Marathi Literature.