On November 27, 2021, Grand Duchess Maria Teresa attended the presentation and the third signing session of her book "A Sovereign Love" in the Luxembourg International Bazaar at Luxexpo the Box. Hereditary Grand Duke Guillaume, Hereditary Grand Duchess Stephanie and their son Prince Charles visited Grand Duchess Maria Teresa at the Luxembourg International Bazaar. "A Sovereign Love" (Un Amour Souverain) was written by Grand Duchess Maria Teresa of Luxembourg and Stephane Bern on the occasion of this year's 40th wedding anniversary of Luxembourg's Grand Ducal couple.