Hi, all I bought prof XML2e today and am going to prepare the XML certification. I searched the FAQ and IBM site, and they recommend two more books, which are prof XML schema and o'reilley's XSLT. However, when i searched amazon, for xml schema, o'reilley's xml schema or essential Xml quick reference are new editions and looks popular. for xslt, prof XSLT and o'reilly's xslt are popular. Could you give me a advice which one will be suitable for the exam and have a good reference books? thank you.