The Crowfield Curse by Pat Walsh : Is it a dead series?

Ok so today I bought both the Crowfield Curse and the Crowfield Demon by Pat Walsh at a great deal (€5.98 for both books). Now these have been out for around 5-6 years and the third book hasn't been out yet and no one I ask knows about the third book. It was supposed to come out 2016... Is it the 3rd and final book of the series? (making a trilogy) Anyone know when is it coming out?