also: ハウトゥーぼん
how-to book; instructional book
A book that teaches practical skills or procedures, such as cooking, crafts, or software usage.
I recently bought a cooking how-to book and am trying new recipes every day.
self-help book
A book focused on personal development, mental well-being, or life improvement, rather than a specific technical skill.
I read a self-help book on stress relief and learned ways to relax.
Standard spelling; ハウツー is the most common katakana representation of 'how-to'.
Alternate spelling using トゥ to more closely mimic the English 'to' sound; less common than ハウツー.
Wasei-eigo (Japanese-made English) combining the English 'how-to' with 本 (book).