Excellent resource
I bought this book to supplement the plant science unit in my IB diploma Biology courses (year 11-12).
Clegg is the best biology text author I have seen in 15 years of teaching and 10 years of college. The content is not only well explained (common feature) but contains abundant, rich graphics that serve to teach and explain the content; they are not merely add-ons for color (like many texts). Clegg has quickly become my go-to resource for all text/biology materials.