Shemirat Shabbat Kehilchatah, also pronounced Shemiras Shabbos Kehilchosoh, (Hebrew: שמירת שבת כהלכתה translation: "keeping Shabbat according to its law") is a book of halachah authored by Rabbi Yehoshua Yeshaya Neuwirth, which discusses the laws of Shabbat and Yom Tov, and is viewed by many as an authoritative work regarding these laws. Rabbi Neuwirth is a prominent student of Rabbi Shlomo Zalman Auerbach, and the book generally follows Rabbi Auerbach's opinions. The book discusses practical situations such as driving to a hospital on Shabbat in an emergency.
The book rules in accordance with Rabbi Moses Isserles (the Rema), i.e. according to the practice of Ashkenazic Jews. Because the book is popular and Sephardic Jews wish to use it also, Rabbi Yehuda Lavi Ben-David wrote a commentary of notes called Badey Hashulchan (Hebrew: בדי השלחן translation: "Poles of the table") which delineates the opinions of Sephardic poskim.
Shemirat Shabbat Kehilchatah has been translated to English and is published by Feldheim.
Read more about Shemirat Shabbat Kehilchatah: Volumes, Controversy