In the late 1990s/early 2000s, G.W. Foote & Co (publisher of The Freethinker) released 5 titles in a series of classic secularist and humanist texts. These are now all available electronically from Amazon for Kindle:
G.W. Foote, Secularism: the true philosophy of life
P.B. Shelley, The Necessity of Atheism
E.M. Forster, What I Believe, and other essays:
Denis Diderot, Thoughts on Religion
Marquis de Sade, Dialogue Between a Priest and a Dying Man
There are three fundamental questions for anyone advocating Brexit:
1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?