Haber: Sefiros (2008)
I learned about Rabbi Yaacov Haber‘s (and Rabbi David Sedley) new book titled Sefiros from an entry of Yitzchok Adlerstein‘s Cross Currents blog. The post dismisses most books in English about Kabbalah, but praises this one. Then goes on to argue with or more specifically elucidate whether sefiros are “not descriptions of G-d Himself, but are themselves part of His creation.” The 20 comments are also informative.
The book itself was published by and available from TorahLab. It is “a practical 49 day guide to spiritual refinement through counting the Omer.” Three sample pages can be downloaded from the publisher’s site, to get a sense of its content.