Somasimple,

In fact writting a book don´t prove anything, but all authors do it even those we think they got "good theories" (Cyriax, Maitland, etc..) and sometimes before they can prove their theories with scientific papers. As you know in manual therapy still very difficult prove things and are not only PT's working the area. Good or bad theories should be proven in both ways. (We can´t say something is bad because nothing proves it's good). If anyone says that a pencil in a ear cures cancer, I probably w'll be very ceptic, but we never knows... And remember, evidence-based practice is not science, is only the final product. Much of we call science born by mistake...

Best regards