This is both a summary and organization of things to remember and learn.
In Aqeedah: summary / reminder based on the Saudi book prefaced by Salih al-Shaykh, Usool al-Iman(192 pages)
In Fiqh: summary / reminder based on the Saudi book prefaced by Salih al-Sheikh al-Fiqh al-Muyassar (320 pages)
In Sirah Nabawiyah: ar-Raheeq al-Makhtum and as-Sirah of as-Salabi. (320 pages)
These works in mini format can serve as reminders when attempting a quick question in one of three domains but also can be used to learn because everything is organized Key points and list, which greatly facilitates memorization.