It is available through the publisher and through Amazon: https://wipfandstock.com/9781666745153/be-focused-use-common-sense-overcome-excuses-and-stupidity/
For the original endorsement of the Festschrift see:
“A Remarkable Man and an Unmatched Legacy” – Festschrift Honors Dr. Manfred W. Kohl on Occasion of 80th Birthday
https://www.bucer.de/ressource/details/bonner-querschnitte-152022-ausgabe-719-eng.html
The Festschrift is available for free download here: https://www.bucer.de/fileadmin/dateien/Dokumente/Buecher/978-3-86269-236-1_Festschrift_Manfred_Kohl.pdf
