He is also keeper of our tips for Readers - http://thebooktrap.weebly.com/readers-resource
However, Keith Dixon is a font of information on how-to-do and where-to-find. For the year end, here is a list of sites to help you become a better publisher and consequently an accomplished marketer.
Keith Dixon, answering concerns by others in The Booktrap HQ backroom,
Here's a list of 53 sites where you can get free images. My current favourite is Flickr. You can use Gimp (free download) for most of the effects you get in Photoshop though you have to learn it. https://blog.bufferapp.com/free-image-sources-list
53+ Free Image Sources For Your Blog and Social Media Posts
Find the visual content you need with our complete list...
I was just hunting out this site when you posted - it's a list of relevant fonts per genre. Derek Murphy's very good for design advice, too: http://www.creativindie.com/300-fool-proof-fonts-to-use.../
300+ Fool-Proof Fonts to use for your Book Cover Design (an epic list of best...
Dafont.com is another great site - you can put your title in the search box and see what it looks like in practically any font, and then download and install it, which is dead easy: http://www.dafont.com/
Archive of freely downloadable fonts. Browse by alphabetical listing, by style, by author or by popularity.
And finally, a really simple online design package that a lot of people (pros included) are using for their covers: https://www.canva.com/
Amazingly Simple Graphic Design Software, Free - Canva
Canva makes design simple for everyone. Create...
I confess in the posting of this year-end blog, I joined all these sites and actually tried out several - not in depth - as yet.