A decent mystery, this pastiche skims on atmosphere and jumps straight to plot. In fact, while the author does get the characters to sound like Holmes and Watson, the plot itself is a multiple suspects whodunnit more reminiscent of Agatha Christie than Doyle. This is not necesarily bad, though.
What it is bad are a couple of editing mistakes in the later part of the book. In p. 244 Holmes laments the death of a character. However, this character death is not actually discovered until the next chapter... and it is not a clever deduction by Holmes, it simply like seems some dialogue was changed around during a rewrite and this piece of information wasn't caught, which is first disconcerting when you read it ("What! Did I miss something?"), then annoying when you realize what must have happened. Also, relatively minor compared to that, in p. 264 a letter is read and, as it is usual in these cases, the text box is indented and in itallics. However, after the single paragraph that is supposed to be the letter, both indentation and italization continues for the two following dialogue lines of Holmes and Watson reacting to it.
Of course I cannot ask to the fellows at Titan Books to correct my print copy, but I suggest that they fix the ebook versions and that they are more careful in the future with these kind of things. Editors are there for a reason and mistakes like these can ruin the enjoyment of reading a perfectly good story.