The Ramchal’s Derech Hashem is a must read classic for any Jew.
I’ve created a one page table of contents of Derech Hashem, which you can download here.
There are two translations available from Feldheim:
Rabbi Aryeh Kaplan’s translation can be purchased from Feldheim or Amazon.
Rabbi Abba Zvi Naiman’s translation and elucidation can be purchased from Feldheim or Amazon.
They’re both excellent and highly recommended to purchase and read over and over again to understand the fundamentals of Judaism.
Rabbi Abba Zvi Naiman’s translation also includes a detailed elucidation with lots of commentary culled from the other works of the Ramchal and other commentaries on the Ramchal.
I updated the post to say:
Rabbi Abba Zvi Naiman’s translation and elucidation
Do you know what prompted Feldheim to have the sefer re-translated?