Bernard Sumner, Stephen Morris and Gillian Gilbert have joined with Phil Cunningham and Bad Lieutenant bassist Tom Chapman to play a pair of charity shows in Paris and Brussels next month.
Hook said: "I first I heard about this on Monday and it has taken me completely by surprise!
"Everyone knows that NEW ORDER without PETER HOOK is like QUEEN without FREDDIE MERCURY, U2 without THE EDGE, SOOTY without SWEEP!"
He added: "On a more serious note, I do not understand the decision THE OTHER THREE have taken.
"I wish they had approached me first. I do not agree with the methods they have used and feel it would have been courteous and professional to have spoken to me in advance of the announcements. It is very sad. Love PETER HOOK x Sept '11"
Since New Order's second split in 2007, Hook has toured Joy Division's two studio albums with his band The Light.
> Unreleased New Order song for compilation
Watch New Order play 'World In Motion' with Keith Allen live at the Reading Festival in 1998 below: