Download Algebra: Abstract and Concrete.
This book is being offered free of charge to anyone interested in learning abstract algebra.
The book provides a thorough introduction to "modern'' or "abstract'' algebra at a level suitable for upper-level undergraduates and beginning graduate students. The book addresses the conventional topics: groups, rings, fields, and linear algebra, with symmetry as a unifying theme.
Some recommended books:
Algebra books:
P.M.
Cohn,
Basic
Algebra
P.M.Cohn,
Further Algebra and Applications
General Interest:
The
Princeton
Companion
to
Mathematics
Symmetry
and
the
Monster:
The Story of One of the Greatest Quests of Mathematics
A River Runs Through It and Other Stories, by Norman Maclean.