Well a couple tips are:
1. Have good grammar. No one wants to read a book with a bunch of spelling mistakes and improper use of punctuation
2. Be descriptive. Paint the image for the reader, and they’ll enjoy it more
3. Before starting a book, be sure to have the whole plot planned out, or else you could start losing interest in writing the book fast
4. Try to have interesting parts, like cliffhangers and such. I for one enjoy to put cliffhangers
5. Clarity. This kind of fits in with description, but always make sure the reader understands who’s talking and what’s going on, along with other important details like the setting and such.
Anyway, hope that helped! And if you can, be sure to check out my book on Amazon! I have the link on my About section! And if you can’t, tell others!