You could get yourself a copy of al-Bunis Shams al-Ma’arif, if you’re into more occult aspects 
Talismans, divination, magic squares and numbers and letters, jinn, angels…
Other than that I think that in the Quran there are 81 Names of Allah mentioned and you can actually meditate on them. Depending on the attribute of each name you could make use of these names (for example, Al-Muhaymin: The Preserver of Safety for shielding or protection workings).