The book "Brain-Computer Interface Research" provides a comprehensive overview of ten of the most promising projects in the field of brain-computer interfaces (BCI) developed in recent years. Research in the BCI field has rapidly advanced, with numerous new ideas, research groups, and improved technologies. BCIs enable individuals to communicate solely through thoughts, without any movement. This technology has already helped many severely disabled individuals facilitate communication and is also being used to support recovery from strokes, epilepsy, and other conditions. The book summarizes the results of the BCI Award 2014, in which 69 research groups competed for a nomination. It includes chapters from the ten nominated groups, detailing their projects, including methods, results, and current developments. The vivid presentation, featuring numerous images, graphics, and illustrations, makes the latest trends in BCI research accessible to a broad audience.