Hi!
Today I have only done my WaniKani lessons, but no further learning. Instead I checked different blogs, which textbook is preferable.
The contenders were Genki, Marugoto, Japanese From Zero, Minna no Nihongo.
There are a lot of different opinions. Most people recommend the book, which was their textbook when they started to learn Japanese.
Genki is most people’s favorite. It may not be the best book for self-learners, but is less focused on classrom lessons like Marugoto. Japanese From Zero is popular as well, but the lessons are slower and intruduce Hiragana in the first book and Katakana in the second book.
I picked Genki, because it’s popular and there are even online sections for self learners. If I get Marugoto later this year I may compare both books.