A huge resource for mathematics students and students of history. The School of Mathematics and Statistics at the University of St Andrews has compiled a huge biographical index of important mathematicians that covers virtually all of human history from 500BC to the present day. Not a textbook in the traditional sense but this history of mathematics archive offers students a virtual encyclopedia full of information on famous mathematicians for students, scholars and lifelong learners.
View this Free Online Material at the source:
The MacTutor History of Mathematics Archive