Book royalty income, 80qqb and itr to fill

Hello All,

This question is for AY 2017-18

I received royalty income for a book I authored in last financial year . This book is on computer programming and is not a text book. The book’s nature qualifies for a deduction under section 80QQB. Could you please help with the following

Income details

1. I have a regular SALARY income from the employer (India) .  So far, all these years I have only filled ITR1 or ITR2
2. This year, also have the book royalty income (15% of which is tax decuctible)

Note 1: Already obtained duly filled forms 10CCD from the publisher and 10H from my bank where the royalty was credited. 

Note 2: Writing is not my ‘full time’ job, in previous year I wrote this book  receive a royalty  that's all. 

QUESTIONS:
A) Under which section should I DECLARE my royalty income ? (is it income from other sources) .
B) Which ITR form should I use for this purpose? (AY 2017-18)

I already know details of 80QQB so no questions on how to compute the 80QQB amount. The question is on how to declare the income..