All praises belong to Allaah Tabarak o Taala the Rabb of the universe. 
May the special mercies of Allaah and peace be on our master Muhammad Sallallahu Alaihi Wasallam who is the seal of all Ambiyaa (prophets). May Allaah's mercy and peace be onhis family, at his companions and all  those coming until the Day of Qiyaamah who follow him dutifully.

A masterpiece Book and Encyclopedia on life of Prophet S.A.W. & Sahaba Karam Radiallahu Anhum 
Some People Requested the great Daee Hadrat Mawlana Yusuf to write a book on Dawat o Tabligh and its principles so that after him the work remains on the Usool. 

Maulana Yusuf  refused, saying, 

"I am an Ummati and Dawah is for whole Muslim .I am not the standard.
The huzur e Pak sallallahu Alaihi Wasallam and Sahabah are the standard for Dawah and its Manhaj. 
That is why Maulana Yusuf R.A. wrote Hayatus Sahabah / The Lives of Sahaba ."

Why Sahaba are criteria and best standard to understand Quran and Hadith

ABUL HASAN ALI NADVI Rahimullah explain in these words.

Maulana Ilyas R.A. Recognised the importance of Emulating Rasulullah and Shaba for effective Dawah and correct Manhaj 

Maulana Yusuf R.A. Expertise and  Status as Great Scholar of Seerat e Rasulullah and Hadith Scholar of Present Time

Sahaba are criteria and best standard to understand Quran and Hadith
They were the blessed group whom Allaah  had chosen to be the companions of His beloved Rasulullaah. The Sahabah Karam Raziallahu Anhu are the foundation of this Deen and were the first to propagate it. They acquired the Deen from Rasulullaah and conveyed it to us. They are therefore most worthy of , whose example deserve emulation.

Hadhrat Abdullaah bin Mas'ood Raziallahu Anhu used to say, "Anyone wishing to follow the (religious) ways of another should follow the ways of those who had already left the world, namely the companions of Rasulullaah who were the best people of this Ummah. Their hearts were pure, their knowledge deep and pretentiousness (showing-off) was non-existent in their lives. Allaah Tabarak o Taala has selected them to be the companions of Rasulullaah and to propagate His Deen. You should therefore acknowledge their virtue and distinction. Follow in their footsteps and adopt their character and lifestyles with all your strength because they were the ones on the path of guidance."

The inspiring rays from the sun of Nabuwaat shone directly on them without any screen. It is impossible for anyone after them to acquire the warmth of lmaan and the spiritual illumination
that they received.
 It was only the assembly of the Sahabah ,that the Qur'aan pays tribute to by declaring that Allaah is pleased with them, they are pleased with Him, and that they were rightly guided people as well as guides for others.

It is because of this that the Ummah has always been unanimous about the fact that,any matter on which they all agreed is regarded as an authoritative law in the Shari'ah. Anyone who rejects their virtuousness is in danger of falling outside the fold of Islaam.
The Sahabah  were mirror images of Rasulullaah's perfect character and the most comprehensive Icons of his attributes. They were the truest interpreters of his praiseworthy attributes, his excellent character as well as all the rulings and proofs of the Shari'ah. It is therefore necessary to follow them so that the Muslim Ummah may save themselves from all deviated manners.

All praise is due to Allah Who made this great book of Da’wah to benefit Muslims.  

Hayatus Sahabah (English: Lives of the Sahabah) is a known collection (2000+ pages) about the companions of the prophet Muhammad sallallahu alaihi wasallam,
written by a famous Islamic scholar, and Daee e Kabeer Muhammad Yusuf Khandlawi the illustrous son of Shaikh Maulana Muhammad Ilyas the revivalist of dawah and tabligh all over the world in this age.

This ‘Hayatus Sahabah‘ originally compiled in Arabic by Maulana Muhammad Yusuf Kandhelwi (rahimahullah) ,  is the book of this modern time on Da’wah. It has been translated in many languagges including urdu,english,malyalam,Bangla etc.

you can download this book from the link

It has all the details about the activities of Prophet Muhammmad (s) and his companions.

Each of the 19 chapters is compiled with references of Qur’an and Hadith on every detail of their activities, analysis of situations, revelations, and decisions. 

Throughout the book detailed references are listed to show all sources. Each story or event carries a lesson for the Ummah as a guiding tool for Da’wah activities.

The present worldwide condition is fully ripe for Da’wah. People around the world want to know the true message of Islam. 

As Muslims and followers of Prophet Muhammad (sallallahu Alaihi Wasallam), it is more important than ever to understand the responsibility and convey the Message of Islam with wisdom. 

We need to sort out the process to convey the message in every situation in a smart way to most benefit those who are eagerly seeking the truth. 

This book has all the guidelines and practical steps taken by Prophet Muhammad (s) and his companions. These serve as living examples in front of us as the best of benefit.

Da’wah and Tabligh activities are a global effort. As time progresses more and more interface with various communities around the world are being developed in terms of language, culture, situations, backgrounds, etc which require us to find and apply the best possible approach. 

Efforts are in progress constantly to find and apply the most effective way to convey the message.

Such processes are constantly being updated and applied to meet the needs of their time.

 For this reason, it is more important not only to do the effort of Da’wah, but also to update and apply the most effective process. 

On the other hand, if we thoroughly evaluate the process and meet the condition / challenge of the time, our efforts will provide positive results. 

 For this reason, this book is a very effective tool to see how Prophet Muhammad (s) and his companions constantly consulted, planned, re-planned, organized, distributed, budgeted, communicated, strategized, etc to get best out of their situations. They did not leave anything possible unattended, but did everything possible on their part though they faced all kinds of difficulties and suffering. At the same time they heavily relied on the help of Allah. Allah made them victorious, successful in both worlds.

The examples of Prophet Muhammad (s) and his companions are in front of us as compiled in this book.

Let us use this as much as possible as a guiding tool in the efforts of Da’wah and Tabligh to maximize the benefit of our efforts. Amin.