An engaging book is one with a good plot, the vehicle than drives the story. Sometimes the author introduces an implausible or conveniently coincidental element to a story, and we're willing to suspend our disbelief and accept the premise.

I love the Harry Potter books obviously, but one plot hole I can't come to terms with is that Albus Dumbledore did not tell young Harry nor his own colleagues, it seems, about the true identity of Lord Voldemort until after the chamber of secret horrors in Harry Potter and the Chamber of Secrets.

Lord Voldemort was and is Tom Riddle, son of witch Merope Gaunt and Muggle Tom Riddle. He's a half-blood wizard who hates Muggles and other half-bloods, the wizard version of Adolph Hitler, the man who tried to wipe out an entire race.

In Chamber of Secrets, Lucius Malfoy slips Riddle's cursed diary into Ginny Weasely's cauldron. We found out in Half-Blood Prince that the diary also was a horcrux. If only the wizarding world, including Harry, had known that Voldemort was once called Tom Riddle, a whole lot of problems would have been avoided (pardon the passive voice; it flowed better).

Ginny would have recognized the name and tossed the diary or turned it in to Dumbledore. That would have ended the diary-horcrux/chamber of secrets horror before it started. If she had no clue who Riddle was, then her father definitely would have known. More important, Dumbledore, at the very least, should have told Harry Voldemort's real name.

If Ginny, Mr. Weasely, Harry, and others had known all about Riddle, Chamber of Secrets would be a different story from the one J.K. Rowling wanted to tell. In that regard, I dig what she was trying to do. Still…

I can suspend disbelief about a lot of things in the HP series, but that plot problem is too humongous to ignore. It is too implausible to believe that Dumbledore, for whatever reason, chose not to tell/warn people that Riddle and Voldemort were one in the same.