I prefer the book to the movie. Always.
The only two exceptions are Masoom (based on Man, Woman, Child) and Guide (Guide).

Raju Guide’s life is a roller-coaster of lost dreams, broken promises, shunted relations.
His idyllic life twists with the entry of Rosie, the young, spurned wife of the much older archeologist Marco. Rosie grasps onto Raju’s shoulder as she rejects her marriage for her only true love…Dance.
Alas, her passion for dance and Raju’s obsession for her lead them into a downward spiral of deceit, misunderstanding and betrayal. Who betrays whom? Can Raju rise beyond the mundane into the sublime?

The book differs from the movie somewhat: Rosie in the book is single-mindedly focussed on her career. Once Raju is out of her life, she is all competence and confident self-assurance as she takes up the reins of her life and career. Rosie of the movie is more emotional, naive, vulnerable and sacrificing (as all Indian movies demand of their heroines)

Lingering moments: Waheeda blossoming from a sulking nag to a carefree soul as soon as she wears the ghungroo (dance anklets), the snake dance, Saiyyan beimann song seamlessly interwoven into Kya se kya; Raju guide  blithely counteracting the Sanskrit-spouting swindlers with his English.
Major thumbsup: The haunting soundtrack by S.D Burman is a massive plus point for the movie, along with the easy charm of Dev Anand and the exquisite Waheeda Rehman. Innovative song takes by Vijay Anand.

Recommended: Both book and movie.