The book you're likely looking for is:
If you are looking for the "new" high-quality print of the original 15-volume Arabic set, it is available through: Al-Sharh Al-Mumti' Ala Zaad al-Mustaqni, Shaykh Uthaymin sharh al mumti english pdf new
by Kamila al-Kuwari provide a condensed version (about 1,300 pages) that summarizes the Shaykh's core opinions for easier study. The book you're likely looking for is: Key Features
Unlock one of the most celebrated modern explanations of Hanbali Fiqh. Sharh al-Mumti’ is a comprehensive commentary on Zaad al-Mustaqni’, written by the late eminent scholar Shaykh Ibn Uthaymeen. This digital PDF edition brings the Arabic classic to the English-speaking world, offering a seamless bridge to classical Islamic jurisprudence. If you are looking for the "new" high-quality
Many new PDFs are actually thematic compilations. For example: "Rulings on Transactions from Sharh al-Mumti" or "The Chapter of Marriage." These are excellent for researchers but are not the full Sharh.
Specific Subject Manuals: Topics covered in Sharh al-Mumti are often released as standalone English books, such as the The Concise Manual of Marriage