Reference: al-Imaam Ibn Baaz – Duroos wa Mawaaqif wa ‘Ibar – page 23
Shaykh ‘Abdul-‘Azeez ibn Baaz was asked about the best book he had read, and he said:
al-Imaam an-Nawawee’s explanation of Saheeh Muslim.
And he was asked about how many times he had read it, and he said:
I have read it more than 60 times.