What are some good books on algebraic inequalities?
The Cauchy-Schwarz Master Class: An Introduction to the Art of Mathematical Inequalities by J. Michael Steele.
Basics of Olympiad Inequalities (Samin Riasat)
www.aam.org.in/site/st_material/14.pdf
It's a free pdf document and it is very useful.
$1$. Garling - Inequalities
$2$. Cvetkovski - Inequalities
$3$. Zawaira - A Primer for Mathematics Competitions