"This Girl" by Colleen Hoover is the third and final book in the Slammed series. It is a young adult romance novel that tells the story of Will and Lake's relationship from Will's perspective.

The novel begins with Will and Lake on their honeymoon in Mexico. They reflect on their journey to get to this point and reminisce about how they fell in love. The rest of the book takes place during the three days leading up to their wedding day.

As Will prepares for the wedding, he thinks back on his time with Lake and how she has changed his life. He reflects on their struggles and the challenges they have faced together. He also realizes the importance of the role that Lake's family has played in their relationship.

Throughout the book, Will shares some of the poetry he wrote for Lake during their courtship, giving readers a glimpse into his emotions and feelings for her. He also revisits some of the key moments from the first two books in the series, shedding new light on them from his perspective.

The novel explores the theme of the power of love to transform and heal. It also highlights the importance of communication and forgiveness in relationships. The book is a heartwarming conclusion to the Slammed series, and fans of the first two books will enjoy getting to see the story from Will's perspective.

Overall, "This Girl" is a beautifully written novel that captures the complexities of relationships and the power of love. It is a great read for fans of young adult romance and those who enjoy books about the transformative power of love.