Here are the links to the main online stores where you can find my books:

Gumroad – I like to sell my work from there, as I get better royalty rates than other distributors and more control over how I distribute my work. They are available in the formats: EPUB, MOBI, PDF and there is a Send to Kindle function. Gumroad is Paypal enabled! Thank you for supporting an independent writer!
https://gumroad.com/wls

Amazon
https://www.amazon.com/David-Sloma/e/B00CIC65S4

iTunes
https://itunes.apple.com/ca/artist/david-sloma/id437457972?mt=11

Google Play
https://play.google.com/store/books/author?id=David+Sloma

Barnes & Noble
http://www.barnesandnoble.com/c/david-sloma

Smashwords
https://www.smashwords.com/profile/view/davidsloma

Kobo
http://store.kobobooks.com/en-ca/Search?Query=david+sloma

DriveThruFiction
http://www.drivethrufiction.com/browse.php?author=David%20Sloma

Scribd
https://www.scribd.com/author/246458895/David-Sloma

Overdrive
https://www.overdrive.com/creators/766004/david-sloma

24symbols
https://www.24symbols.com/author/david-sloma?id=493964

Inktera
http://www.inktera.com

Playster
https://play.playster.com/books/author/4661996/david-sloma

Also on Tolino and other smaller stores.