The Wallflower Wager is a delightful regency rivalry romance book written by Tessa Dare. The story revolves around Lady Penelope Campion, a spirited young woman who has given up on finding love. When Gabriel Duke, a wealthy and enigmatic man, moves next door, Penelope finds herself drawn to him despite their initial clashes. As they navigate their growing attraction, Penelope and Gabriel discover the healing power of love and acceptance. With its charming characters and heartwarming romance, The Wallflower Wager is a must-read for regency romance enthusiasts.