That said, the medicine in The Haunted House is already pretty sweet, if a little pious and saccharine at times. The haunted house of the title is engagingly drawn, complete with cataleptic maids and panicky cooks - people that are as whimsically ridiculous as anyone Edward Gorey could create. But the house isn't really haunted - at least not by rattling spirits. The only ghosts that haunt the denizens of the house are their own. Their memories, pasts and experiences comprise the 'haunting' stories named for each of the occupied rooms.
Ultimately, the set-up is a fairly Dickensian exercise in catharsis, redemption and acceptance, although Dickens did not write all of the stories himself. He orchestrated the frame tale, entitled "The Mortals of the House," and contributed two other stories, but the rest were commissioned for the Christmas 1859 edition of All the Year Round. Wilkie Collins, Elizabeth Gaskell and Hesba Stretton, among others, contributed, each writing a story set in one of the 'haunted' rooms. Sadly, most are negligible, though pleasant reads. There are exceptions in Collins' tale of the terrors of a candlestick, and Stretton's melancholy story of nearly lost love, but, for the most part, Dickens initial frame tale, "The Mortals of the House," is the only must read.
So, here's my recommendation:
Should you be interested in trying The Haunted House, borrow it, read the frame, and cherry pick the rest. Then go read Great Expectations for a full dose of the good stuff.