Are you looking to learn more about publishing and the book industry? Here are a list of articles and blogs that will give you a great education on a number of key topics:
And if you want to hire someone to help you out? I like these folks:

NY Book Editors – nybookeditors.com

Proofed to Perfection – proofedtoperfection.com

Kirkus Editorial – kirkusreviews.com/editing-services

Travis Tynan – travistypecraft.com

Three Fates Editing   threefatesediting.com

The Book Designer – thebookdesigner.com

GKS Creative – gkscreative.com

Pressbooks – ingramspark.pressbooks.pub

Van-Garde Imagery – van-garde.com

Bright Lights Graphics – brightlightgraphics.com

Shane Watson – oreganoproductions.com/illustration

Damonza – damonza.com

Deranged Doctor Design – derangeddoctordesign.com

99designs – 99designs.com

Mila Graphics – milagraphicartist.com

Self Pub Book Covers – selfpubbookcovers.com

The Book Cover Whisperer – professionalbookcoverdesign.com

GKS Creative – gkscreative.com

Miblart – miblart.com

Bright Light Graphics – brightlightgraphics.com

Karl Spurzem – karlspurzem.com

Up My Influence – upmyinfluence.com

Where Writers Win – writerswin.com

Stress Free Book Marketing – stressfreebookmarketing.com

Smith Publicity – smithpublicity.com/welcome-ingramspark-authors

1106 Design – 1106design.com

TLC Graphics – tlcbookdesign.com

Mighty Spark Design – mightysparkdesign.com

Pub Site – pub-site.com

Nate Hoffelder  natehoffelder.com

ListenUp Audiobooks – listenupindie.pub

Book Buddy Media – bookbuddymedia.com

Findaway Voices – findawayvoices.com

Book Launches Simplified – booklaunchessimplified.com/

Books to Big Screen – bookstobigscreen.com/

Audiobooks Made Easy – audiobooksmadeeasy.com

Draft2Digital – draft2digital.com

Kapwing Video Editor – kapwing.com/

Plotrr – plottr.com/

Publisher Rocket – publisherrocket.com/

Mockup Shots – mockupshots.com/

Canva – canva.com/

Book Cave  mybookcave.com

Goodkindles – goodkindles.net

The Fussy Librarian thefussylibrarian.com

Bargain Booksy bargainbooksy.com

Just Kindle Books justkindlebooks.com (Use discount code NSB for $5 off!)

Robin Reads robinreads.com

LitNuts litnuts.com