'Abd Al-Rahman Al-Sulami - The Forty Hadith on Sufism excellent translation with a very informative introduction and commentary. a wonderful read.
Concise and comprehensive: http://www.scribd.com/doc/96339429/Treatise-on-Discipline-in-the-Path-of-The-Seeker-Imam-Al-Haddad
Mukashifat ul Quloob : by Hazrat Hujjat ul islaam, Imam Ghazali Kashf ul Mahjoob : by Hazrat Ali Hajveri (Data Ganj Baksh).
I have downloaded this book from here: http://marfat.com/DownloadBooks/Saraj Alawarif/WQB.pdf For now, I have scanned through it. In-sha'Allah, I'll read it in the near future. Any other suggestions?
Siraaj ul 'Awaarif fil Wasaayaa wal Ma'aarif by Shaykh Sayyid Abul Husain Ahmad al Noori al Qadri Marahrawi radi Allahu Ta'ala 'anhu Originally in Persian it has been translated into Urdu and English al Hamdulillah The English version is called Horizons of Perfection translated by Shaykh 'Abd ul Haadi al Qadri.
What books regarding tazkiyyay tun-nafs do you recommend for a beginner? (Something about what bad traits are and how they can be treated, and what good traits are and how they can be gained, would be good.) It can be in Arabic, Urdu or English.