This is another well-written Fletcher mystery. Fletcher usually develops his plots around some interesting characters and settings, this book is no exception. I enjoyed the unexpected revelation at the end of the book.
The initial story line sounded promising. Returning from a 30 year space voyage, the crew finds their home planet destroyed by plague. But the snail's pace of the plot and unconvincing characters were too much for me to overcome. I found the book disappointing considering the high reviews - as always, decide for yourself.
As in his novel _Deathworld_, the author builds much of the story line around the idea of human physiological adaptations to alien environments. It was a pleasant surprise to find this Hugo-nominated book here. Thank you, manybooks!