To Dwell in the Palace, Tzvia Ehrlich-Klein (ed.), Feldheim Publishers; Yerushalayim, 1991. (See especially Rabbi Leff's introduction and the article entitled "My Mystery Companion" by Yisra'el Amishav.)
Em HaBanim Semechah, Rabbi Shelomoh Teichthal (HY"D), Yerushalayim.
A fascinating book, written in the Budapest Ghetto during World War II,with very few resources in front of him, yet quoting numerous books. Rabbi Teichthal started his Rabbinic Career as a vehement opponent to the zionist movement, dissaproving moving to Eretz Yisrael. In his later years, he changed his mind, and went around Hungary preaching to his brothers to go to Eretz Yisrael. Rabbi Teichthal himself never made it to Eretz Yisrael - he was brutally murdered by the Nazis towards the end of WWII. HY"D.
If only I could stay, Pinchas Winston, Mercava / Feldheim
Practical advice:
Ephraim Bluth, The Pocket Book Shaliach Aliyah advice for the pragmatic idealist.
Gefen publishing house ltd., POB 36004, Jerusalem 91360, 972-2-5380247
Personal accounts
From both sides now, Jay Shapiro
A Personal account from one who both made Aliyah, and afterwards went back as a Shaliach.