Settling into the fifth book of an established series always involves a particular kind of listening comfort, the pleasure of returning to characters you know and a procedural world you have learned to trust. Leave No Trace, Sara Driscoll's fifth FBI K-9 novel narrated by Susan Bennett, delivers that comfort while also extending the series' best quality: the genuine integration of working canine behavior into the investigative logic of the thriller, not just as window dressing, but as functional plot mechanism. This audiobook rewards both series regulars and listeners who are arriving for the first time with the fifth volume in hand.
First, the Big Picture
The setup is economical and effective. One arrow through the heart in the mountains outside Blue Ridge, Georgia, could be a hunting accident. A second arrow, days later, through a different victim, cannot be. FBI Forensic Canine Unit agents Meg Jennings and Brian Foster head south with their dogs, Hawk and Lacey, to follow a scent trail that connects two apparently unrelated victims: a county commissioner and a State Patrol officer. What Driscoll does well from the opening chapters is establish that the connection between victims is not immediately apparent, and that Meg and Hawk's search-and-rescue capabilities are not just useful in the field but are the primary investigative tool through which the narrative advances. The canines drive the plot rather than decorating it.
Susan Bennett's narration has been a consistent strength of this series, and Leave No Trace is no exception. She provides distinct vocal texture for Meg and Brian without exaggerating the differentiation to the point of caricature. When the canine characters, Hawk and Lacey, enter scenes, Bennett's reading of the handlers' responses to them registers the human-animal bond with warmth that never slips into sentimentality. One reviewer described the dogs as the emotional center of the series, and the narration supports that claim without foregrounding it artificially. The tone is professional and engaged across all nine hours and forty-six minutes.
The Georgia mountain setting gives Leave No Trace a distinctive atmosphere that separates it from the series' earlier urban and suburban environments. Blue Ridge and the surrounding woods are rendered with specificity, and the compound bow as murder weapon introduces a particular kind of predatory silence that Driscoll exploits well for suspense. The killer's method of appearing and vanishing without forensic trace suits a canine-tracking investigation plot logically. It creates a procedural problem that Hawk and Lacey's search capabilities are precisely suited to address, which maintains the genre promise across the full length of the investigation.
The Best Parts of Leave No Trace
The historical dimension that emerges as the investigation deepens adds meaningful weight to what could have been a straightforward serial killer procedural. Driscoll connects the present-day murders to events reaching back nearly two centuries in Georgia's history, and the revelation of this connection reframes earlier scenes in ways that reward attentive listening. The historical grievance as motive structure is more unusual in procedural crime fiction than the format might suggest, and Driscoll handles it with enough care that the reveal carries genuine resonance rather than feeling like a convenient backstory bolted onto a contemporary thriller.
Reviewers note that the characters are well-developed and that the series maintains engagement across installments without feeling repetitive, which is the fundamental challenge for any long-running procedural series. One reviewer described the book as "another excellent installment" specifically praising the character work alongside the plotting. Another praised both Meg and Brian and their dogs as the kind of characters you return to across volumes, which is the core metric of series success.
Bennett's performance in the scenes where Meg gets closer to identifying the killer's design, and closer to stepping into the compound bow's range, is notably effective. She reads the escalating danger with controlled urgency rather than melodrama, which fits both Meg's professional character and Driscoll's restrained prose style. The audiobook's final act pays off the patient procedural groundwork without rushing the emotional resolution that the character relationships require.
A Few Reservations
As the fifth book in the FBI K-9 series, Leave No Trace assumes familiarity with the partnership structures and character relationships established in earlier volumes. New listeners will not be lost, but they may find certain emotional beats less resonant than series regulars for whom Meg, Brian, Hawk, and Lacey are known quantities. Driscoll provides enough contextual information to orient newcomers without over-explaining for returning listeners, which is competent series management but means no single entry is fully self-contained in its emotional architecture.
The pacing in the investigation's middle section is methodical by design. Driscoll constructs her procedural plotting carefully, and the process of following forensic evidence, interviewing witnesses, and mapping the historical connections that link victims does not rush. Listeners who expect constant kinetic action between setup and resolution will find the rhythm deliberate. Those who appreciate procedural thoroughness will find the payoff in the final act proportional to the investigative groundwork laid in the hours before it.
Should You Listen to Leave No Trace?
Fans of the FBI K-9 series who have followed Meg and Hawk through earlier volumes should listen in order; this is a series that builds its emotional capital across books, and Leave No Trace draws on that investment. For newcomers, it is a functional entry point if you are willing to accept that some relationships carry history you have not yet witnessed. Listeners who enjoy procedural crime fiction with a strong animal partnership element and an authentic wilderness setting will find Driscoll's approach distinctive within the genre. Skip if you need action density over investigative depth; Leave No Trace rewards patience and repays it generously.
Frequently Asked Questions
Can you listen to Leave No Trace without reading the earlier FBI K-9 audiobooks?
Yes, with some caveats. Driscoll provides enough context to orient new listeners, but the emotional weight of the character relationships is considerably deeper if you have followed the series from the beginning.
How prominent are the dogs in this audiobook's plot?
Central. Hawk and Lacey's search-and-rescue capabilities drive the investigative logic, not just the atmosphere. The canine tracking sequences are functional plot mechanics, not decorative additions to a human-led story.
