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
Old and New Inequalities Volume 1 - Titu Andreescu
Old and New Inequalities Volume 2 - Vo Quoc Ba Can et.al.
Algebraic Inequalities - Vasile Cirtoaje
Secrets in Inequalities - Pham Kim Hung [Volume 1 and 2]
Inequalities with Beautiful Solutions - Vo Quoc Ba Can et.al.
To my best knowledge, all the problems presented in the above mentioned books are solved.