Yes we already have one
Rather than a book, consider investing in a fast-response probe thermometer - so you can tell whether your food is cooked/heated inside. External appearance isn't the guide you might be used to, when using an airfryer! Even a cheap one will be better than none...
thanks ordered this air fryer and just waiting for delivery
It comes with one which isn’t too bad, also there was a free downloadable one posted on the site yesterday I think?