I am a beginner who wants to self-study rigorous calculus and real analysis. (I just had elementary high school calculus)
Not a few people recommended me Spivak's calculus, which is known as a great introduction to proof based mathematics.
I was also informed about Abbott's Understanding Analysis, I guess this book would be incredibly enjoyable to work through, nevertheless someone said that it should be a very tough adventure especially with weak calculus background :(
The last one is Apostol's Calculus, but I don't know this book very well.
I am a bit confused since I have no idea which one would be a suitable selection. Thus I'm begging for an advice :0