I used to be a huge fan of Colin Forbes, but his books seemed to deteriorate into the realms of "the publisher wants this tomorrow and i'm only halfway through" and I stopped reading.
The worst example I can provide was of a novel I no longer even remember the name of. The plot at this point revolved around a load of illegal immigrants turning up at some random location in Britain and our group of lead characters observing this from a distance. Suddenly, and for no reason I could identify, the lead character developed a particularly nasty dose of flu, had to be helped home, helped into his pyjamas and insisted his notebook be left on his bedstand....after that the story resumed two weeks later.
I was just...it was jarring, totally unneeded, a simple "two weeks later Tweed and Marler were looking over the case files when..."
I don't remember any more of the book.
He also tries too hard to prove he's not being sexist which can be equally as annoying as blatant sexism, he's determined to write a strong female character who shrugs off the help f the menfolk, it can seem a bit drilled into your head.
Oh, POD to mary-sue characters btw, i abandoned a book after a few chapters onve after reading about a girl who was being hunted down for no specified reason, had to flee home, survived some horrible events, was found by an important family from nearby and taken in by them as one of their own, discovered she was the last daughter of some powerful magician or other, nearly got her adoptive family killed for being her father's daughter, chose to leave and was showered with expensive gifts before leaving.
I wasn't even half way in. Simply couldn't stomach it.