I've only read Paulo Coelho's two books, which is 'The Alchemist' and 'The Fifth Mountain'. The alchemist was clearly one of his bestselling amazing books, so is The Fifth Mountain.
This story proves the theory that how love, affection, faith and hope can change every perception. In this book, Elijah is completely changed, is life, attitude, personality, when he met the love of his life, and he learned to have hope and faith as he spent his life in the streets of Akbar. He learned to believe in other gods and the woman taught him to love.
By the end, it shows how love and hope can change a person, even when there's no hope for life.
This book is exactly the motivational, inspiring, philosophical type of book.