Next book from the library book bag: Shroud for a Nightingale by P. D. James. It's an Adam Dalgliesh mystery, which means the new Scotland Yard is on the case, and it will be solved within a short time--less than a week most likely. The setting for this murder mystery is Nightingale House, an English nursing school. The first murder takes place in a classroom with a dozen people watching as the student nurse is mistakenly administered poison through a feeding tube as part of a teaching demonstration.
The next body is another student nurse and she is found in her sleeping room, another case of poisoning, this time nicotine. Adam and Sgt. Masterson have to sift through the evidence and get past the prevailing opinion that we are looking at a murder followed by a suicide. Of course, Adam is in danger--an attempt is made on his life, but his great detective work is rewarded with solving the murders, although the murderer does go free.
If you are looking for a classic murder mystery that is well written, pick up any novel by P. D. James and you will be well satisfied.