"该书的前言里详细地介绍了他读‘自然哲学的数学原理’后受到的启发。"
---I guess it's just a trick to promote his book.

认真读过"Visual Complex Analysis",对自己研究启发很大。
---what specific enlightment you got? Could you please just give a few examples? Thanks in advance.

Arnold wrote such a book decades ago although his graphics are not as impressive as Needham's.