Alhamdulilah, the translation of The Greatest Universal Sureties, by the late authority Imam Muhammad Saeed Ramadan al-Bouti, has now been published. This is by far, to date, the most detailed and exhaustive text on orthodox (Sunni) Islamic theology in English, written by one of this age's greatest theologians. In addition to covering foundational matters, such as the Lord's attributes, salvation and eschatology, the book also deals with modern issues, such as religious relativism and the theory of evolution. It is an absolute must for any English speaker seeking a deeper understanding of Islam and its core doctrines.
UPDATE: It has also been brought to my attention (via emails and social media) that the book is not available to order via the Dar al-Fikr website, or something goes awry when trying to order from that website. I am on the case. In addition to trying to solve that problem, I am also trying to find out who Dar al-Fikr's distributors are in the UK, US and other parts of the Anglosphere. Insha'Allah, the book will be available soon, either via the website or a bookshop near you. I will post updates here whenever I receive news, i.e. in this post or in the comments below.
And with Allah is every success.
p.s. I'm still waiting for my copy.
UPDATE: Please see the 8th comment below, dated 11 November 2017 at 18:30.