Find Spellling Misteaks For Boook Publishers

Being a good speller is the first step towards being a well paid professional proofreader. Knowing your English grammar is important. So is recognising the difference between there/their/they're. Knowing sew and so are different. Same goes for salvage and selvedge.
General knowledge is important.
Even better is having specialised knowledge in some niche such as: health, legal, sports, cooking, gardening, yachting, dogs, sewing, boat-building or 1001 other specialist areas. There's work for everyone who becomes a qualified proofreader. Think international.
There are 1million new books written every year and they all need a proofreader and editor.