The Lost Novels of Bram Stoker is a horror/fantasy student's and literature historian's delight. Beyond that...I don't believe modern audiences will take to these stories.
The Jewel of Seven Stars, the lead story in the book, has a powerful and captivating first person POV. Definitely creates a sense of intimacy between narrator and reader, and it's not strong enough to carry through the entire novel because the story itself slows to a stop a little past halfway through. I got bored and wondered why. Simple enough - no conflict. Quite a stretch with no conflict, in fact. Previously there'd been just enough to keep me turning pages. I wondered where it all went.
This is something I've seen before with even modern and recognizably gifted authors; they loose their focus, the story wanders, eventually they regain their focus and the story concludes elegantly.
The three novels in this book - The Jewel of Seven Stars, The Lady of the Shroud, and The Lair of the White Worn - originally appeared as magazine serials and each story shows the mark of where Stoker had completed writing but not finished the novel. The novel got serialized, eventually it came time for him to submit something not yet written, he'd lost the flow of the story due to working on other projects, oh my god what am I to do?
Improvise.
In these cases, poorly.
The same is true for the other two novels in this volume.
One extra note regarding The Lair of the White Worm - boy, do I wish I knew what Stoker was on when he wrote that.