- Killer dust, [a mystery featuring forensic geologist Em Hansen], Sarah Andrews
- Bone hunter, [a mystery featuring forensic geologist Em Hansen], Sarah Andrews
- Rock bottom, [a mystery featuring forensic geologist Em Hansen], Sarah Andrews
- Fault line, [a mystery featuring forensic geologist Em Hansen], Sarah Andrews
- Dead dry, [a mystery featuring forensic geologist Em Hansen], Sarah Andrews
- Earth colors, [an Em Hansen mystery], Sarah Andrews
- In cold pursuit, [a mystery from the last continent featuring Valena Walker], Sarah Andrews