Further reading
Books about earning on the side
The directory is still the list we were willing to check. These are books other people sell about side income, if you want to read further. A title that names a sum of money is the publisher’s claim. It is not a result Sideline has verified, and it is not an offer.
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No Risk Side Hustle
Jimmy Cockerton
A 60-day plan for testing a business while you still have the job. Pearson, aimed at people who cannot afford to resign first.
Online Tutoring: The Ultimate Guide to Creating a Profitable Online Tutoring Business
Change Your Life Guru
How to set up paid online tutoring. Any income figures in it are the author’s, not a rate Sideline has checked.
Side Hustle
Chris Guillebeau
A 27-day sequence for picking and launching a small side business without leaving the day job. The UK paperback is titled for the extra money; the US edition is From Idea to Income in 27 Days. Same book.
The 7 Figure Side Hustle
Miles Beckler
A short Kindle book about online marketing and affiliate income. The title is a promise. Almost nobody who tries this kind of work makes seven figures.
The $1K AI Side Hustle
Tamer Ahmed
A guide to building a small automated income with AI tools, in about five hours a week by the author’s account. The “$1K” is a target on the cover, not a result Sideline has verified.
100 Side Hustles
Chris Guillebeau
Case studies of ordinary people who started small side businesses, drawn from his Side Hustle School interviews. Ideas, not a guarantee you will copy the result.
102 Offline Side Hustle Ideas
Charles King
A menu of offline ways to earn, from the same series as his online ideas book. Use it to notice work that already exists near you, then check the local price yourself.
HowExpert Guide to 365+ Side Hustles
HowExpert
A long catalogue of freelance, local, online, creative, and business ideas. Useful for breadth. It is not a vetted list, and it is not a substitute for the directory on this site.
Side Hustles For Dummies
Alan R. Simon
A plain walk through starting a side gig: time, records, and how to stay clear of scams. The closest thing on this page to a reference book.
The UK Side Hustle Guide 2026
Abbey City
A short starter written for the UK: local platforms, a 90-day plan, and a note on tax. The US store sells the same book.