Daniel Linden has been involved with martial arts for over 50 years. He is a 6th degree black belt in Aikido (Aikikai) and a teacher in his own school. His books On Mastering Aikido and Journey, On Mastering Ukemi are classics in the field and available from all the usual suspects. The Aikido Mystery Series with Sensei Parker is Mr. Linden’s attempt to generate interest in Aikido, as the art has lost a great deal of popularity over the last couple of decades and he sees the mystery series as a chance to bring it back before the public’s eye. They are also a hell of a lot of fun to write, he says. His literary novel, The Content of Character has been praised as a masterwork and depicts the life of a man suffering from Asperger’s syndrome as he tries to deal with the American dream and his own struggles with normalcy, racism, and brotherly love. When not involved in the study and teaching of Aikido Mr. Linden builds guitars and mandolins in his workshops in Florida and Maine, where he has a small farm. He travels with his wife Laurie, and dog, Gibson. Daniel Linden served the public in municipal security and has been on assignment with the F.B.I., FDLE, multiple police agencies, and has been billeted with the United States Secret Service under three presidents. He is retired now and writes full time when not sanding maple and spruce in his workshop. All books are available (or will be soon) in Audio format, e-book format, and in print.