Hippo Beginners
For those of you who are new to the Hippo, if you open the link below and click on the blue button
[ Sample Pages ]
you will download a pdf sample from the new book by De Santis which contains some very useful, basic information about how to set up a Hippo.
Look for chapter 7 "The significance of the Hippopotamus moves". It covers 1...g6, 1...b6, and the Semi-Hippo.
And it's free!
https://www.newinchess.com/en_US/the-hippopotamus-defence?mc_cid=ec69bb3f0d&mc_eid=1d598cf582