Feivel-
The author of Bilvavi Mishkan Evneh is Harav Itamar Schwartz from Eretz Yisroel.
He happened to have been in New York Two weeks ago and held many drashos.
It may be interesting to note that he has many extremely warm haskamos from all different types of gedolim.
You can see & hear shiurim from him on the web at bilvavi.net