In recent weeks Flynn has appeared to send out signals of support to the movement - sprinkling references in his internet column and purportedly signing his new book with the QAnon slogan, according to The Daily Beast.
'I think these dog whistles are subtle enough that if you don't know anything about Q, you can read this piece and not feel like he's talking to a bunch of violent conspiracy theory maniacs,' Mike Rothschild, a journalist who tracks the QAnon movement, told the outlet.
https://www.dailymail.co.uk/news/article-8491799/General-Michael-Flynn-leads-friends-reciting-oath-Constitution-QAnon-slogan-July-4th.html