A fun book to read

Sharing a book I just finished and thought you folks might enjoy.  It is called Once a Spy by Keith Thomson. I found it to be a humourous and fun read - a spy book with lots of action and twists involving the main character - a retired spy developing alzheimers and who is knowledgeable about a secret weapon ( he actually developed it) but who now is in jeopardy because his "people' think he is a risk to expose the info. His estranged son becomes involved and as a team they try to thwart the bad people. His son grew up not knowing his father was a spy so along the way with their adventure he is being constantly shocked with bits of info about his father that starts to put some perspective into his past. I enjoyed it......