Start with high-confidence haiku books, then narrow by subgenre or adjacent topics.
A Little Book on Form
Robert Hass
Moon Woke Me Up Nine Times
Matsuo Basho
Intro to Haiku
Harold Gould Henderson
All the Words Are Yours
Tyler Knott Gregson
Haiku
Ornella Civardi
The Haiku Handbook #25th Anniversary Edition
William J. Higginson, Penny Harter
The Pocket Haiku
Basho, Buson
A White Tea Bowl
Mitsu Suzuki, Kazuaki Tanahashi
A Beginner's Guide to Japanese Haiku
William Scott Wilson
Soseki Natsume's Collected Haiku
Soseki Natsume
The Poetry of Chiyo-ni
Patricia Donegan, Yoshie Ishibashi
