- AudiobookPrince of SpiesAlex Gerlis
- AudiobookRing of SpiesAlex Gerlis
- AudiobookSea of SpiesAlex Gerlis
- AudiobookEnd of SpiesAlex Gerlis
- AudiobookAgent in the ShadowsAlex Gerlis
- AudiobookThe Swiss SpyAlex Gerlis
- AudiobookThe Miracle of NormandyAlex Gerlis
- AudiobookThe Best of Our SpiesAlex Gerlis
- AudiobookAgent in PerilAlex Gerlis
- AudiobookVienna SpiesAlex Gerlis
- AudiobookThe Berlin SpiesAlex Gerlis
- AudiobookSeries: Richard PrinceAlex Gerlis
- AudiobookAgent in PerilAlex Gerlis
- AudiobookSeries: Spy MastersAlex Gerlis
- AudiobookSeries: The Wolf PackAlex Gerlis