A new sefer on Kiruv, a collection of many Maamorim of Rav Shach, zt"l is being published.
Rav Shach, zt"l had very clear guidelines for 'Avodas Hakiruv'.
There are many differences between the guidelines in Kiruv established by Gedolei Eretz Yisroel and the Gedolim in Chutz l'aretz, shlita.
The Gedolei Chutz l'aretz tend to have a more lenient approach about many issues related to Kiruv.
Hagaonim Hagadolim, Harav Ahron Feldman, Harav Shmuel Kaminetzky, the Noveminsker Rebbe, shlita are very involved in questions pertaining to Kiruv and view the questions from an American perspective.
Hagaonim Hagadolim, shlita Harav Ahron Schechter & Harav Elya Ber Wachtfogel have a consistent view with the Gedolei Ertz Yisroel on most issues related to Kiruv.