This is a great question. I would certainly recommend this book to teenagers. I would do so for three reasons.
First, the language is masterful. So, if young readers want to be exposed to good writing, then they need to look no further. This aspect of the book makes the book worth reading.
Second, the central issue in the book - racism - is enduring in our country. For this reason, the book is as relevant today as it was when it was first published. Racism is one of the more intractable evils in our society. Hence, to be able to discuss it is important.
Finally, To Kill a Mockingbird offers a vision of courage. Atticus is an amazing character. We need heroes in literature, and he is one of them. From this perspective, he can be an excellent source of inspiration.
To Kill a Mockingbird is a book that I would recommend for several reasons.
The novel covers a number of issues and themes that are very much relevant in the lives of teenagers, even in 2015. The most central issue of the novel, racism, is still a concern for many teenagers in America in 2015. The novel, although written from a child's perspective, confronts the underlying and not so underlying issues of racism. The novel teaches the lesson that no matter what person's skin color is, they deserve the right to be treated fairly. This is shown through Atticus' ideals and opinions as he deals with the trial of Tom Robinson and the effect it has on his kids, Scout and Jem.
The next reason I would recommend this novel is for the many historical aspects that can drawn from it. The novels setting in during the time period of the Great Depression. Many of the families in the novel are effected by the Depression. We also get a look into the social class systems of the time period and how some whites felt about blacks at the time.
The last reason that I would recommend this novel is due to the many great lessons, particularly the discussions, that will come as a result of reading the novel. Students are able to take the events, ideas, themes and concepts that are present in the novel and relate them to real-life, real-world events that are happening today. This makes the students so much more engaged.
To Kill a Mockingbird is a timeless classic and I would recommend it to students for years to come.