
Grimstone
romantic thriller
Series · thriller
The Covert Asset series by Brad Lee has 2 books and is best read in publication order, starting with Target Redacted (2023).
Start here: Target Redacted (2023) — then read straight through in publication order.
The order the books were released — the default way to read the series.
A companion series to Brad Lee's Unsanctioned Asset books, Covert Asset follows Thomas "T-Bone" Marks, a long-retired Navy SEAL turned small-town teacher who is pulled back into covert operations, beginning with Target Redacted (2023). The series has also been translated into German (published as Der geheime Agent), reflecting the same reader base built by Lee's first series.
No shared characters are confirmed -- it's a separate series by the same author, following retired SEAL Thomas 'T-Bone' Marks rather than Axe Southmark.
Two confirmed as of this curation (August 2026): Target Redacted (2023) and Target Unknown (2024); a third book had been referenced as forthcoming on the author's site but no confirmed title or date was found.
Reading order last verified .