Marcel van der Plas was born in 1969 in Eindhoven and still lives in Eindhoven. He has been an Oracle Consultant for over 15 years. Marcel has worked on many projects with Oracle Designer, Oracle Forms and Oracle Reports. Later on, he became interested in APEX and did some projects with APEX. At the moment, Marcel has been working on an APEX project for an electronics company for over 2 years.Marcel currently works for Ciber. Other companies he worked for are Atos Origin and Whitehorses. For Whitehorses, he wrote some articles ('Whitebooks') about Oracle.Marcel already wrote the Oracle APEX 4.0 Cookbook together with Michel van Zoest. You can find APEX blogposts from Marcel at http://orclapex.blogspot.com. Besides that, you can follow Marcel on Twitter (@whmvdp). Michel van Zoest is a consultant with years of experience in building web applications using Oracle technology such as Oracle web Forms, Oracle Designer, MOD_PLSQL, ADF, SOA Suite and of course, APEX.He is one of the first Oracle Application Express Developer Certified Experts in the world. He has used his APEX knowledge in projects for companies ranging in size from a single employee to large multinationals. His experience in these projects has been used in the realization of this book.Michel currently works at Whitehorses in the Netherlands and runs his own blog at http://www.aboutapex.com. He also blogs at the company website on http://blog.whitehorses.nl and he regularly writes Whitebook articles (in Dutch) for Whitehorses.You can reach Michel on Twitter at @mvzoest or e-mail him at michel@aboutapex.com.