Establish the Prayers... and The Prize is Paradise is a book by Abdul-Malik Al-Qasim and has 48 pages.
This is a very enlightening booklet regarding the Salat (prayer), a obligatory pillar of Islam. Salaf were very committed to act upon it, and they strive the Ummah (Muslim nation) to act upon this commitment. About this, Rabi'ah bin Yazid said:
"For the past forty years, the caller to prayer (the Mu'adhdhin) never called the people to Zuhr prayer without me being in the mosque, except when I was ill or traveling.
While Amir bin Abdullah was dying, he heard the Adhan (call to prayer) and said: "Lead me by my hand.' They said to him, 'You are ill.' He said 'How can I hear the Mu'adhdhin, yet, do not respond to it?' They took him by his hand, and his home was near the Mosque. He started the Maghrib prayer behind the Imam and was dead upon finishing only one Rak'ah.
Ibn Sama'ah said: "For forty years, I only missed Takbir Tahrimah when my mother died.