I've temporarily misplaced the wild foods 'cook book' I started with. But using it for a few meals helped build confidence to play with my own recepies. The dishes from my garden rarely have a name other than 'food', or 'dinner' and the same is now true of wild foods.
Samuel Thayer's
books are fantastic. I wish I had started out with them. Very detailed, with descriptions, and several pictures of each plant. He specifies methods for preparation, which help in deciding what other dishes to include them in.
I cannot comment on Kallas' book as I have not seen it.