My wife got me the World Atlas of Whisky for Christmas and I love it.
I was looking for some atlas. Is this the one? https://www.amazon.com/World-Atlas-Whisky-New/dp/1845339428
The World Atlas of Whisky by Broom is a good start imo.
Here it is on Amazon:
The World Atlas of Whisky: New Edition https://www.amazon.com/dp/1845339428/ref=cm_sw_r_cp_api_i_UhWvDbXHP5M5D
Personally the Scotch flavor map I've been using the most is from The World Atlas of Whisky (link below). Its an awesome book and a great resource for exploring the world of whisky. It outlines the basics of whisky making and styles along with a ton of information on the world's whisky distillers and regions. I highly recommend it.
There is also a flavor map located in the FAQ section of r/scotch that I occasionally reference as well. Google image search will also bring up a bunch but the one I link below I've found to be incredibly reliable and accurate.
https://i.pinimg.com/originals/bc/ea/b9/bceab9eace0849b3436f56175ad840af.jpg
https://www.amazon.com/dp/1845339428/ref=cm_sw_r_cp_apa_i_NHgsFb321XACS
I found The World Atlas of Whiskey a great book to start with. I found it while I was touring the The Scotch Whiskey Experience in Edinburgh, Scotland but bought it when I came back to Canada.
It covers the 4 general ways to distill whiskey and the different flavour profiles you get with each whiskey. In addition, it gives you an overview of the major whiskies in different regions (Scotland, Japan, America, Canada, etc). I didn't find it biased since it gives no ratings; instead, it just give flavours, profiles (Nose/Palate/Finish) and similar whiskies.
I will admit that it is a bit biased toward Scotch (about 1/3 to 1/2 the book is whiskey from Scotland) and it's lacking on the craft distillery scene.