Algebraic problems present a significant portion in all math competitions including MathCounts, AMC, AIME, USAMO and so on.
Therefore, solving competition level algebraic problems is a must-master skills for every contest contender.

Though algebra is taught throughout middle and high schools, many useful techniques are left out.
Taking Vieta's theorem as an example. While many students knows how to evaluate expressions such as $x_1^2+x_2^2$, they will need to learn additional methods in order to effectively evaluate higher power expression such as
$x_1^{7}+x_2^{7}$, or asymmetric such as $5x_1^3 + 3 x_2^5$. In addition to expression evaluation, Vieta's theorem can also be used to solve some seemingly unrelated problems.
Therefore, merely knowing the school way to use Vieta's theorem is far from being competition ready.
This book will teach students many additional ways to utilize this theorem so that they will be able to use it in the best way.

Sequence is another example. A competent student should be able to use sequence to solve some seemingly unrelated problems, such as equations, trigonometry, complex numbers etc.
All these are not taught in classrooms.

The goal of this book is to give in-depth discussion on various competition specific algebric techniques. They can be used either on their own or as steppingstones to solve complex problems.
Nevertherless, mastering these techniques will surely lay down a solid foundation for students to achieve high in various math compettions..