There's a book which I don't remember much about. I probably read it in about year 1979, but that I'm sure dated at least 10-15 years earlier. I've never found another reference to it since then.
From what I remember, it involved a boy and girl who somehow make the acquaintance of an alien that resembles an anthropomorphic moose (yes, really). There was some plot element about how the alien could teleport them. There were also some instances of shrinking force-field around them that they couldn't leave, possibly generated by the alien's moose like antlers. The reading level for this one would have approximated that of the Mad Scientist novels, and the few illustrations were similar in style to those in the Mad Scientist books as well. I don't have too much more to go on, except there was a Roald Dahl-like tone to the book as well.
Can anybody help me find it?