The Books Insiderindependent audiobook data
Delta by Dale Mayer

Delta: Audiobook

Book 23 of the K9 Files series

According to The Books Insider's catalog data, the Delta audiobook runs 6.3 hours unabridged, narrated by Brian Meslar (about 4.2 hours at 1.5× playback speed).

6.3listening hrs
Mysterystore shelf
2024released
Free for new listeners

The instrument When will you finish it?

Based on 6.3 hours of listening.

Days to finish Delta at common listening paces
Your paceYou'll finish in
30 min / day13 days
1 hour / day7 days
2 hours / day4 days
1 hour / day at 1.5×5 days

Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.

What our data says

  • At 6.3 hours, it is shorter than 74% of the 7,690 Mystery audiobooks in our catalog.

Catching up on The K9 Files

This is book 23. Books 1 to 22 run 120.6 hours before it; books 1 to 33 run 185.9 hours in all.

BookTitleLength
1Ethan6.2 hrs
2Pierce5.6 hrs
3Zane5.3 hrs
4Blaze5.8 hrs
5Lucas4.8 hrs
6Parker5 hrs
7Carter5.8 hrs
8Weston5.5 hrs
9Greyson5.4 hrs
10Rowan5.1 hrs
11Caleb5 hrs
12Kurt5.2 hrs

About as long, on the Mystery shelf

1,062 Mystery 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

Delta is book 23 of Dale Mayer's K9 Files series: a 6.3-hour unabridged recording, read by Brian Meslar, released March 1, 2024, on the Mystery shelf.

The listen at a glance

Length
6.3 hrs
Narrated by
Brian Meslar
Released
March 1, 2024
Format
Unabridged audiobook
Language
English
Store shelves
Mystery
Series
The K9 Files #23
ISBN
9781778862977

How to listen to Delta 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 free

Questions listeners ask

How long is the Delta audiobook?

Delta runs 6.3 hours unabridged. At 1.5× speed that drops to roughly 4.2 hours.

Is the Delta audiobook free?

Yes, for new listeners: the trial starts you with three free audiobooks.

Who narrates Delta?

Delta is narrated by Brian Meslar.