A collection of sources
1. Soul After Death (St Seraphim Rose)
https://azbyka.ru/otechnik/Serafim_Rouz/dusha-posle-smerti/
2. Life after death (Metropolitan Hierotheos Vlachos)
https://azbyka.ru/otechnik/Ierofej_Vlahos/zhizn-posle-smerti/
3. Life after death according to the Orthodox tradition (Professor Jean-Claude Larchet)
https://azbyka.ru/otechnik/Zhan_Klod_Larshe/zhizn-posle-smerti-soglasno-pravoslavnoj-traditsii/
4. The Mystery of Death (Nicholas Vassiliades)
https://azbyka.ru/otechnik/bogoslovie/tainstvo-smerti/
5. Eternal Mysteries Beyond the Grave (Archimandrite Panteleimon)
https://azbyka.ru/fiction/tajny-zagrobnogo-mira/
To translate the books into your preferred language use google translator.