"One of the weaker Tintin episodes, ‘The Black Island’ often feels repetitive and aimless, and occasionally the characters seem to lack logic, but some thrilling sequences nevertheless keep it mildly entertaining."
"Tintin follows the trail of an airplane that he encountered in Belgium. The passengers in the plane were not very pleasant and shoot him as he tries to help. Once he recovers, he follows their trail all the way to Scotland and uncovers a criminal conspiracy. The story is very much like a Hitchcock or film noir mystery and moves along at a fast pace.
Interestingly, this book had three different versions. I seem to have read the third version as described in this article."