[evalayCap]

I would recommend these three to get a general understanding.



Shaikh Ibn Taymiyyah's sharh of Futuhul Ghaib.

http://www.al-rashad.com/Commentary-...ib_p_3307.html

Shaikh Ibn Qayyim's Al-Waabilus Sayyib

http://www.al-rashad.com/Merits-of-R...ib_p_2706.html

Shaikh Muhammad Zakariyyah's Shari'ah and Tariqah (which you've probably come across already)

http://www.scribd.com/doc/25518400/Shariat-Tariqat

him* ajma'een