Ewald Geschwinde and Hans-Jüergen Schöenig are the founding partners of Cybertec Geschwinde and Schöenig, and Austrian company that provides commercial PostrgeSQL support, training, tuning, and remote administration for international clients. Geschwinde and Schöenig have used Mono extensively to develop high-end applications.
Other books by these authors include PostgreSQL Developer's Handbook (0-672-32360-9) and PHP PostgreSQL Advanced Web Development (0-672-32382-6).