The just one I preferred most, And that i ended up reading completely, is Rudin's 1: I am a PhD scholar in engineering and I feel the level on the reserve was excellent to me. $begingroup$ I do think an excellent initial book is 'A First Course in Mathematical Examination' https://cashiwjue.free-blogz.com/83572062/5-essential-elements-for-por-qué-es-bueno-leer-el-tarot