Science/philosophy books that changed your perspective

Recently read 'The Poetics of Space' by Gaston Bachelard and it has transformed how I view and think about physical spaces. Was wondering if anyone could suggest books like that. Books that changed your perspective or world-view. Just to clarify – not looking for books that changed one's perspective on life. Not into self-help books or books of fiction that made you realise the truth about life (come on, no nonsense). My interest is purely on the science/philosophy domain.