I Couldn’t Go Outside, So I Just Stayed In and Read Light Novels All Day!
The titles available to read for free:
Der Werewolf: The Annals of Veight (Volumes 1-3)
Walking My Second Path in Life (Volume 1)
Can Someone Please Explain What’s Going On? (Volume 1)
Demon Lord, Retry! (Volume 1)
Otherside Picnic (Volume 1)
An Archdemon’s Dilemma: How to Love Your Elf Bride (Volumes 1-3)
Bluesteel Blasphemer (Volume 1)
Cooking with Wild Game (Volumes 1-3)
Demon King Daimaou (Volumes 1-3)
I Saved Too Many Girls and Caused the Apocalypse (Volumes 1-3)
If It’s for My Daughter, I’d Even Defeat a Demon Lord (Volumes 1-3)
In Another World With My Smartphone (Volumes 1 and 2)
Infinite Dendrogram (Volumes 1-3)
Invaders of the Rokujouma!? (Volumes 1-6)
My Big Sister Lives in a Fantasy World (Volumes 1-3)
My Little Sister Can Read Kanji (Volumes 1-3)
Paying to Win in a VRMMO (Volumes 1-3)
Record of Wortenia War (Volume 1)
Seirei Gensouki: Spirit Chronicles (Volumes 1-3)
The Combat Baker and Automaton Waitress (Volume 1)
The Greatest Magicmaster's Retirement Plan (Volume 1)
The Master of Ragnarok & Blesser of Einherjar (Volumes 1-3)
Ascendance of a Bookworm (Part 1 Volume 1)
Ascendance of a Bookworm (Manga) (Volume 1)
Sorcerous Stabber Orphen: The Wayward Journey (Volume 1)
If you don't want to bother with setting up any account and you're happy to read from a web browser on your smartphone, just head straight over to the J-Novel Club site and start reading the eligible volumes.
If you prefer to be able to pre-download entire volumes so you can read even when offline, then head over to BookWalker instead. You'd need to set up an account if you don't already have one and download the BookWalker app to your device, but it's probably the better option for reading on a tablet or any device other than a smartphone.
Please note that downloaded eBooks from this promotion will only be readable until April 30th, 2020 PT.
The "readinside" code is only required to activate the 30-day membership trial of J-Novel Club, which you should probably only use after you've already exhausted the available free volumes (just make sure to use it before the end of April).
The "Catch-Up" titles (where you can read all translated volumes of the selected titles) for April, available with the J-Novel Club trial membership: