English

Judaism and Reincarnation by Rabbi Dov Ber Pinson
Jewish Tales of Reincarnation by Yonassan Gershom
The Jewish Concept of Reincarnation and Creation by David M. Wexelman
The Dybbuk by Gershon Winkler

Hebrew
Shaar Hagilgulim by Rabbi Chaim Vital
Nishmat Chaim by Rabbi Menashe ben Israel
Minchat Yehudah / Ruchot Mesaprot by Rabbi Yehudah Petaya
Toras Nassan / Shorshei Haneshamos by Rabbi Nassan Zvi Kennig

 

Web

Aishdas (Talmudic, etc. sources on the Afterlife)