Mumbai, Dec 26 (IANS): A book about the struggle and hardship of Bollywood actor Emraan Hashmi with his son Ayan's cancer treatment will be out by April 2016.

Emraan, who will next be seen in director Tony D'Souza's upcoming film "Azhar", took to Twitter, to he announce that the book will be out by April.

He also shared an image where he and his four-year-old son are being photographed for the upcoming book.

"Fun photoshoot for my book with @RohanShrestha... Book will be out by April. Always great to shoot at home," he tweeted on Saturday.

Meanwhile, Emraan, who is known for films like "Murder", "Jannat" and "The Dirty Picture" among many, has started to shoot for the fourth instalment of "Raaz".

The actor had shared that he will be shooting in Transylvania, Romania.

"'Azhar' almost done! Next one... 'Raaz 4 Reboot' in nail biting -15 degrees in Transylvania. Off to Dracula's castle," the 36-year-old actor, who had also been a part of the second and the third instalments of the franchise, had shared on Twitter.

The film will be directed by Vikram Bhatt and is slated to hit the screens next year.