The world of adult colouring books has come a long way since Johanna Basford kicked off the trend with 'Secret Garden' back in 2012.
Last year, more than three million adult colouring books were sold in the UK and the books could soon be subject to VAT.
Funnily enough, it's not just the relaxing impact of floral patterns keeping us all so occupied.
From pages filled with swear words to books designed to make you giggle when you're drunk, here are our favourite colouring books that are definitely designed for adults.
The aptly named 'Classic Cocktails Colouring Book' has 11 original cocktail illustrations to colour in and includes a recipe for how to make each one.
Designed by Kate Broughton, the book contains illustrations and recipes for the Mojito, Old Fashioned, Pina Colada, Martini, Singapore Sling, Bloody Mary, Manhattan, Tom Collins, Margarita, Cosmopolitan and Sidecar.
What's even better is that it's been made from 100% recycled paper and card.
Buy it for £4.50 here.
'Pen15 Club: Members Only Coloring'
has been created by two female architects who were inspired by the fact that most buildings look like male genitalia.
The pair are currently crowdfunding so that they can sell this masterpiece to the masses.
"What the world really needs is a beautifully-crafted piece of literary art that is also full of dicks. So we decided to erect it ourselves," they say on their crowdfunding page.
Check out Indigogo to donate
Drake seems like a pretty chill dude, so what better way could there be to relax in the evening than colouring him in? The A4 Drake colouring book
includes illustrations from 15 artists and is set over 32 pages.
"Ultimate lover, all time friend - he only means one thing..."reads the book's site.
"So we dressed down for him, baring all and teamed with some awesome illustrators to create a stripped back colouring book in tribute to his awesome-ness."
Buy it for £7 here
If you like to use expletives, then you'll love this series of sweary colouring books.
Created by Etsy artist Sarah Bigwood, the words can be downloaded individually or, if you're looking for value for money, can be bought in batches of 20.
From bulls**t to w*nk stain, fanny flaps to d**khead, we're sure you'll find a phrase to suit you.
Download an illustration from £2 here.
If you have red hair, or you just fancy people who do, you need the 'Ginger Colouring Book By Colour Me Good' in your life.
Featuring images of Rupert Grint, Christina Hendricks, Prince Harry, Damian Lewis, Julianne Moore and Ed Sheeran, there's one colour you're going to need a lot of when filling in this book.
Buy the book for £9.95 here
'Colour Me Drunk' is for everyone who's fed up with playing beer pong when they've had a bevy or two.
The book is filled with illustrations and tasks set to challenge you when you're at your most boozy.
The question is, can you stay in between the lines?
Find out by buying the book for £11.99 here.
'Colour Me Swooooon' is full of "hotties, hunks, heartthrobs, beefcakes, dreamboats and studs" ready for you to colour in.
With pictures of Ryan Gosling, Jude Law, Brad Pitt, George Clooney, Harry Styles and Bradley Cooper, this is a book that'll keep you satisfied for hours.
Or, if you'd rather stroke a pencil over pretty ladies, check out the all-female version of the book 'Colour Me Girl Crush'
Buy 'Colour Me Swooooon' for £9.99 here
The next best thing after downing a shed load of ice cream (Bridget Jones-style), this colouring book
from the Creative Collective allows the broken-hearted to scribble their way to happiness again.
Each page in the ‘Have A Nice Life Asshole’ colouring book features a swear word or some kind of derogatory phrase with assisting illustrations which you can colour in.
Pick up a copy for yourself or a friend in need for £6 here
There are many colouring books dedicated to Benedict Cumberbatch, but 'My Name Is X and I Am a Cumberbitch' is the one truly dedicated to his fans.
Not only does the book contain images of the actor that buyers can colour in, it also includes a whole load of (Cumberbatch-related) quizzes, inspirational quotes (from Cumberbatch) and, most importantly, a fFive-point plan to dis-Batch your Ben-addiction".
Those in need can pick up a copy from £5.99 here