I can make more photos of the pages of "Folkhemmets Farkoster"
Supposing, that the pictures are most interesting, because the Swedish language is hard to read and translate from a photo.
Because most readers here don't know the book, you also don't know the contents.
Therefore I can make a short overview of the book.
Will take some time to separate the more important themes from the less.
There are some clever details in the vehicles, both with or without an engine.
Most remarkable to me was the "Hillspeed" designed by Joseph Swedberg, a velomobile build as one seater or sociable.
It was fitted with an unusual set of pedals, swinging back and forth on two long levers, instead of rotating.
That keeps the feet and knees down while pedalling and the nose can be therefore designed lower.
Also interesting is the excenter on the rear wheel, wich has the function of a sprocket, but surely is working a bit differently.
Photos from pages 55-59
Hoping, violation of copyrights will not become a problem.