Fear the Worst by Linwood Barclay

Tim Blake's teenage daughter Sydney heads out to work one morning to a local hotel where she has a summer job as a receptionist.  When she fails to return home and doesn't answer her phone Tim drives to the hotel to check she is ok.  The staff there have never heard of her, she is not on their staff list and her car is not in the hotel car park.  Sydney has just vanished without a trace.  

Tim spends all his spare time trying to find his daughter.  She has been reported missing to the police but they don't seem to be doing very much to search for her.  

After a while bad things start to happen to Tim.  There are other people who are also looking for Sydney and he needs to find her first. 

This is the third Linwood Barclay book I have read. I have really enjoyed all of the stories.  'No Time for Goodbye' and 'Too Close to Home' are the others I have read.  They all keep the reader guessing to the end.  

Regarding Anna by Florence Osmund

At age 17 Grace Lindroth arrives home to find both her parents dead in the house.  When sorting through her parents things she finds a box containing papers which make her doubt that she is really their daughter.  She may be the child of Anna Thalia Vargas who was found dead in her home many years before and whose baby had disappeared. 

She trains to become a private investigator so that she can investigate her own past to discover who she really is and find out all she can about Anna. During her investigations Grace makes both friends and enemies and unearths a lot of hidden information.  

This is a great story, which is set in the 1960s.  It is the first book I have read by this author and I will certainly look out for more by her.  There were times when I really didn't want to put this book down.