Reddit reply in r/AcademicQuran: is sunni islam just copypasting shia mysticism — October 2, 2024 | Ali Shukri Amin

...what? Sunni hadith corpus, tafsir works, and Sufi literature is copious. Just by sheer volume there's far more Sunni-Sufi literature than Shi'i mystical literature.

The Mystical Dimensions of Islam by AnneMarie Schimmel is a good academic resource.

Also check William Montgomery Watts two books on al-Ghazali. Ghazali is the premier Sunni Sufi and his Ihya has commentaries that are voluminous (such as Safinat al-Najat).

For Sunni Sufi theology check out Junayd al-Baghdadi's extant works and academic analyses of them.

For Sunni Sufi exegesis check out ibn Juzayy al-Kalbi's Sufic tafsir.

There are countless Sunni Sufi manuals, whether Mat'harah al-Qulub by Mohammad Mawlud or within the specific Sunni turuq (Shadhili, Naqshabandi, etc.)

There are many "Sufi" compilations of hadith specifically to show Sunni narrations from a Sufi light.

Jalal al-Din al-Rumi is the pre-eminant Sunni-Sufi poet.

Even proto-Salafis like ibn Taymiyyah and ibn al-Qayyim had Sufi slants. Ibn al-Qayyim's magnum opus is Madarij al-Salikin, which you can find translated by Ovamir Anjum.

Even ibn Abd al-Wah'hab himself had sanguine things to say about Islamic mysticism.

It's difficult to find a single pre-modern Sunni scholar who didn't pen something on mysticism. This is across the ideological Sunni spectrum. From ibn Qudama to al-Nawawi to al-Qurtubi to Abd al-Ghani al-Nablusi. All legal and theological schools of Sunnism had some kind of a mystical tradition (with the exception of some modern Salafis, but even then not most of them).