Justin Beiber's mom has opened up in a memoir about herself.

Pattie Mallete, Beiber's mother, wrote a book called "Nowhere but Up: The Story of Justin Bieber's Mom." It was published on Sept. 18 by Baker Publishing Group.

The 288-page book is described:

Most people only know her as Justin Bieber's mom, but Pattie Mallette has had an incredible journey of her own. Many people have heard of her son's rags to riches triumph. A few know she was a teen mom who had to overcome a drug and alcohol addiction. Even fewer know the rest of her story.

Now, for the first time in detail, Pattie shares with the world the story of a girl who felt abandoned and unloved. Of a teenager who made poor choices. Of a young woman who attempted suicide and could hardly bear to believe that God would ever care for her. One who messed up, got pregnant, and got a second chance. Every reader will find themselves somewhere in Pattie's painful journey of redemption. They will be encouraged by her example that what was once broken can become whole.

Pattie's story will inspire readers to believe that even in the darkest of places, there's always hope. For those who feel unlovable, there's always love. And for those who believe they're a lost cause, there's always room for another chance.

"Nowhere But Up" was written with the help of a co-writer, A.J. Gregory.

According to LA Times, Mallette writes, "I've spent most of my adult life sifting through the tangled web of emotional wounds and the debris left by the darkness in my childhood."

"I'm really grateful to God and to all the people who have surrounded me and loved me," she told USA Today. "I always wanted to write a book about my story. I wanted to be as vulnerable as I could, so that young girls who have been through similar things could relate. I pretty much bared my soul. It definitely furthered my healing process."

"The Today Show" features an excerpt from Chapter 8 of the book:

"After I unpacked from the car the few pieces of luggage I brought for my eight-month stay, my mom and I said our goodbyes. It wasn't a tearful parting, but that didn't come as a surprise. It didn't even bother me. I was bent on maintaining my independence from her. Even though I was petrified starting this new chapter in my life, I didn't let it show. There were no tears. No quivering lips. I wouldn't even let my eyes water. I maintained a strong and confident composure, pretending I was leaving for summer camp: I'll be back before you know  it, Mom.  I won't forget to write and send pictures. I'll miss you. Bye. But this certainly was no summer camp. I wouldn't return home having learned how to swim or ride a horse. I'd return with a baby."

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Mallette told USA Today that she can't be with her son all the time and watch his every move like she used to.

"He's 18 now and wants to be independent. But I still travel with him when I can. It's a bit of a whirlwind, but we've always been pretty flexible and spontaneous about it."

She also said that Beiber, who just released a new book, "Just Getting Started," a follow-up to 2010's "First Step 2 Forever: My Story," has been a consistent cheerleader for her new project.

"He's really supportive, and really proud of me."