John Bellairs is best known as the author of sixteen gothic mystery novels for young adults comprising the Lewis Barnavelt, Anthony Monday, and Johnny Dixon series. The three stories in this book are the first three in the Lewis Barnavelt series, although the last has more to do with his friend, Rose Rita. The tales collected in this book are "The House with a Clock in Its Walls," "The Figure in the Shadows," and "The Letter, the Witch, and the Ring."
So far from what I've read of this author, his characters tend to be elderly eccentrics, or ordinary children (no superkids, here). Lewis is resourceful, but with a child's fears and limitations. Most especially, he is afraid that his uncle won't like him, that the kids in his new school will make fun of him, and that he'll never have a friend. His uncle, Jonathan and neighbor, Mrs. Zimmerman are very likeable magicians. They play poker with Lewis and make him chocolate chip cookies and cocoa, and generally treat him as a small adult.
The House with a Clock in its Walls (1973) - illustrated by Edward Gorey
Lewis is a newly orphaned, plump ten-year-old, who wears "purple corduroy trousers, the kind that go `whip-whip' when you walk." The author often claimed that his imagination got stuck at ten, and here is Lewis, age ten, going to live with his Uncle Jonathan in New Zebedee, Michigan. The year is 1948, and New Zebedee bears a strong resemblance to Marshall, Michigan, where the author was born--- The Cronin House and the GAR (Grand Army of the Republic) Hall still stand in Marshall, just as their counterparts do in New Zebedee.
The only thing Uncle Jonathan is reluctant to talk about with Lewis is the ticking noise within the walls of his old mansion, recently acquired from a deceased magician.
Lewis discovers that his uncle makes midnight excursions throughout the house, stopping and restarting all of the old clocks. He slowly gets involved in the mystery of an undiscovered clock. The wizardly Izzard couple who used to live in the house are both dead, but what did they leave behind and why?
There are some genuinely frightening scenes in "The House with a Clock in its Walls"---most especially when Lewis tries to impress a new friend by stealing one of his uncle's magic books and taking it to the graveyard at midnight on Halloween---but I don't want to spoil the story for you (Hint: there's a scene straight out of "Count Magnus" by M.R. James when the lock pops off of the crypt). Let me say that this is a truly scary book, and if the author's imagination got stuck at ten, he must lived an awesomely spooky tenth year.
"The Figure in the Shadows" (1975) - illustrated by Mercer Mayer
Lewis wants desperately to believe that an old coin belonging to his Great-Great-Grampa Barnavelt has magical powers. He is being bullied at school and starts to wear the old Civil War coin around his neck for protection. Finally Lewis turns on the bully and beats him up, but he soon learns that the coin has other, even darker powers.
When Lewis begins to see a shadowy figure in a long coat and starts to get scary messages, he asks his friend, Rose Rita to take the coin and throw it away. She wrestles the coin away from him, but instead of throwing it into the storm drain, she hides it.
The bully starts in on Lewis again, and he decides he'll do anything to get the coin back again, even steal it from Rose Rita.
This story has a very spooky climax that will scare even the grown-ups who are reading it to their children.
"The Letter, the Witch, and the Ring" (1976) - illustrated by Richard Egielski
Rose Rita is mad at the world. Her friend, Lewis Barnavelt is going to Boy Scout camp for the summer, and he is the only one who appreciates her for what she is: a tomboy with a great pitching arm who has no interest in growing up into the world of proms and pretty gowns. When Mrs. Zimmerman offers to take her on a trip to see the farm she just inherited from her cousin, Oley, Rose Rita jumps at the chance.
Unfortunately when Mrs. Zimmerman and Rose Rita arrive at the farmhouse up in the woods of Northern Michigan, it has been ransacked. The ring that Oley had found and believed to be magic has been stolen.
When Mrs. Zimmerman herself disappears, it is up to Rose Rita to solve the deepening mystery.
Don't expect milksop magic or easy solutions from this author. Rose Rita has to confront both interior and exterior demons, and comes very close to death before Bellairs winds down to his usual cocoa and cookies (well, roasted marshmallows in this story) ending.