Now, with her mother's life on the line, the young detective must solve the most complex mystery she's ever faced before it's too late. (bookbrowse.com)
I went through and made, actually this time, a very complex mystery, so there are two killers, which I don't usually do. (feedspot.com)
Stephen Hawking, the legendary astrophysicist and a man who has solved some of the most complex mysteries of the universe, was recently asked what it is he thinks about the most. (gottman.com)