Will Sargent reviewed Wicket in Action by Martijn Dashorst
Review of 'Wicket in Action' on 'Storygraph'
4 stars
Good, but a little out of date -- it talks about Wicket 1.3, but links to websites which have either closed down (nabble.com) or points to projects that are "on the wiki" but are now defunct.
That being said, this is the single best resource for Wicket and is practically a requirement to use Wicket effectively. Meanwhile, the concept of Wicket is sheer genius in its simplicity, and I was slapping myself on the head wondering why the industry wasn't doing this 10 years ago.