In this book by Dr Ali M. Es-Sawi you will read about 11 Companions of Prophet Muhammad PBUH; Bilal Ibn Rabah, Musaab Ibn Umair,  Khalid Ibn Al-Walid, Abdur-Rahaman Ibn Awf, Hamza Ibn Abel-Mottalib, Umair Ibn Wahb,  Salman Al-Farisiy, Ammar Ibn Yasir, Said Ibn Zayd, Az-Zubair Ibn Al-Awwam, and Usamah Ibn Zaid. (RAA).