- E-bookSleeping in SpaceTracie Santos
- E-bookToads and Other AmphibiansTracie Santos
- E-bookAnimal SocietiesTracie Santos
- E-bookAnimal AbilitiesTracie Santos
- E-bookBats and Other MammalsTracie Santos
- E-bookSociedades animalesTracie Santos
- E-bookSharks and Other FishTracie Santos
- E-bookHabilidades animalesTracie Santos
- E-bookSnakes and Other ReptilesTracie Santos
- E-bookSpiders and Other ArthropodsTracie Santos
- E-bookVultures and Other BirdsTracie Santos