Sahih Adhkar as-Sabah wa al-Masaa wa Adbar as-Salat - Salih al-Qahtani

This work brings together everything to do with the morning and evening Adhkar. The book is divided into four parts: 

1. Fatwa on dhikr in general
2. Fatwa on morning and evening Adhkar
3. The morning and evening Dikhrs with complete Takhrij and annotations on meaning and Fawa-id.
4. Biographies of authenticating imams: Ibn Hajar, al-Albani, ibn Baz, Muqbil al-Wadi'iy