•Why it earns a slot
Why it earns a slot: it grafts a coming-of-age adventure onto an unsolved real murder case, the Appin Murder, and lets the mystery stay genuinely unsolved on the page.
A teenage heir is sold into slavery by his own uncle, survives a shipwreck and a gun battle, then witnesses a real-life political assassination that puts a price on his head too.
This distillation is written from the freely available original, which is always the better read when you have the time: Project Gutenberg.