I can’t remember when I last bought a book for 95 €… but this I had to have: “Gender Dysphoria and Disorders of Sex Development: Progress in Care and Knowledge (Focus on Sexuality Research)”, edited by Baudewijntje P. C. Kreukels, Thomas Dirk Steensma and Annelou L. C. de Vries. It is written mainly by the Dutch team around Peggy Cohen-Kettenis, a scientific leader in the field of gender dysphoria, who retired in 2013. From the abstract: “This book provides a state of the art review on the care and treatment of and current scientific knowledge on gender dysphoria (GD) and disorders of sex development (DSD). […]”