Hi Norm,
Welcome Wappler - I see Chad is already helping you well with your new journey.
Indeed Wappler is a pretty new product, it officially existing for just a few months. But the technologies inside are based on our 17 years experience with DMXzone.
Documentation links, as well available only courses are listed here:
To my knowledge there are no books yet published about Wappler but as the interest quickly arise i’m sure they will be soon as well.
So explore and enjoy Wappler!