You can even buy the Doctor Dippel book at FictionDB book store online

Click Link Below

FictionDB: http://www.fictiondb.com/author/mitchell-gibbens~doctor-dippel-the-making-of-frank~1331336~b.htm

Barnes & Noble
http://www.barnesandnoble.com/w/doctor-dippel-mitchell-gibbens/1120675392?ean=9781514844588

Amazon
https://www.amazon.co.uk/Doctor-Dippel-Mr-Mitchell-Gibbens/dp/1514844583