[DeepL:] One day a week, the volunteer receives donated books, catalogs them and places them on a shelf. In addition, the books are offered on an Internet platform. Since books are brought in every day, the stock has grown to over 10,000 books. The volunteer can choose the day of the week and is in the book exchange up to 4 hours. In order to keep the exchange open 5 days a week, the volunteers are asked to be present. The book exchange is also a work project for mentally handicapped people who are clients of VITA e.V. Berlin in order to bring them back into a regular daily structure. Volunteers and clients work together as equals. The project has been running for 10 years. Every day there are at least 2 volunteers on site, they also replace other volunteers who are prevented by vacation or illness. There is always a need for volunteers.