Mission: Improper: Audiobook
Book 1 of the London Steampunk: The Blue Blood Conspiracy series
According to The Books Insider's catalog data, the Mission: Improper audiobook runs 13 hours unabridged, narrated by Sienna Frances (about 8.7 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 13 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 26 days |
| 1 hour / day | 13 days |
| 2 hours / day | 7 days |
| 1 hour / day at 1.5× | 9 days |
You'll finish in – by –
Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.
What our data says
- At 13 hours, it runs longer than 89% of the 9,636 Historical (Romance) audiobooks in our catalog.
Catching up on London Steampunk: The Blue Blood Conspiracy
This is book 1. Books 1 to 5 run 63.1 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | Mission: Improper | 13 hrs |
| 2 | The Mech Who Loved Me | 12.5 hrs |
| 3 | You Only Love Twice | 13.3 hrs |
| 4 | To Catch A Rogue | 12 hrs |
| 5 | Dukes Are Forever | 12.3 hrs |
More narrated by Sienna Frances
Sienna Frances narrates 52 unabridged audiobooks in our catalog, 491 hours in all.
About as long, on the Historical (Romance) shelf
1,229 Historical (Romance) audiobooks in our catalog run within 10% of this length. The most popular on the store:
Computed from 409,794 English-language unabridged audiobooks in The Books Insider catalog (store data read November 3, 2026). Lengths are the store's own running times. Methodology.
About this listen
Mission: Improper is book 1 of Bec McMaster's London Steampunk: The Blue Blood Conspiracy series: a 13-hour unabridged recording, read by Sienna Frances, released June 30, 2020, on the Historical (Romance) shelf.
The listen at a glance
- Length
- 13 hrs
- Narrated by
- Sienna Frances
- Released
- June 30, 2020
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Historical (Romance)
- Series
- London Steampunk: The Blue Blood Conspiracy #1
- ISBN
- 9781705223284
How to listen to Mission: Improper free
New members at audiobooks.com get three free audiobooks with the trial.
Separately, the store's catalog carries more than 10,000 audiobooks that are always free to stream.
Start listening freeQuestions listeners ask
How long is the Mission: Improper audiobook?
Mission: Improper runs 13 hours unabridged. At 1.5× speed that drops to roughly 8.7 hours.
Is the Mission: Improper audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Mission: Improper?
Mission: Improper is narrated by Sienna Frances.
Is Mission: Improper worth listening to at 1.5× speed?
At 1.5× you'd finish in about 8.7 hours, saving 4.3 hours.