Helen's Book, which opened in February 2024, offers a selection of espresso-based drinks, including an espresso for €2.50 and a flat white for €5.50, prepared using an XLVI machine. Situated on Rue Claude Bernard, it thrives amidst the Latin Quarter's vibrant student atmosphere and historic bookshops. The café features slow extraction methods, catering to those who appreciate a gentle brew and provides options for plant-based milk. Open three days a week, it offers seating for those who wish to linger, as well as takeaway drinks for passersby.