Trek to Madworld was a fun romp
You know, I didn't care to much for that one. I read it last summer and I sort of lost interest in it about halfway through. I think partly because it started with one story, the colony facing catastrophe, and became something completely different and the original storyline was largely forgotten. It wasn't as bad as the Phoenix novels, it just didn't hold my interest.
"The Galactic Whirlpool" is something I'll have to add to my re-read list. I remember very little about it so it will almost be like new. I don't recall if I read "Planet of Judgment" now. I'll have to skim through it quickly to see if I read it or not already. I thought I did but when I read the summary on Memory Beta I'm not so sure.