My cartoon Ebook on Amazon - can you suggest ways to get more visibility

My cartoon Ebook Funny Cartoons For The Entire Family is on Amazon, Barnes & Noble, Kobo, Apple iBooks and many popular platforms. Can fellow authors suggest other ways to get more visibility? If you have an Ebook that's currently available and you're promoting it, feel free to share any of your promotional techniques. One I used for my ebook was to register with AskDavid and thenImage you also create a link to his site (all about various Ebooks on the market). AskDavid will occasionally send you a notice they will allow you to "tweet" your book on his list and it's a huge list.