The first Taijiquan form I learned in 1986 was the Yang Style Tai Chi Chuan Standard 24 Movement Form. At that time there were no books or instructional videotapes on this popular form.
My webpage on the Standard 24 Form has been the most popular webpage on the Cloud Hands Website for many years. In this sidebar of this blog, you will find a quick index to this webpage and a list of books and DVD's on the subject.
The best book that I have seen on the subject is:
The Yang Taiji 24 Step Short Form: A Step by Step Guide for All Levels
By James Drewe
London, Singing Dragon Press, 2011.
382 pages, black and white photographs, charts, detailed descriptions, training tips
My students tell me that their favorite instructional DVD on the 24 Form is:
Tai Chi - The 24 Forms
By Dr. Paul Lam
I have taught this lovely Tai Chi form to hundreds of people since 2000. Everyone tells me how much they enjoy learning and practicing this gentle form.
I also teach and enjoy playing the Chen Style Taijiquan 18 Movement Form created by Grandmaster Chen Zhenglei.