New Books – How do I do that in PostGIS, How do I do that in Manifold SQL

I have two new books out – How do I do that in PostGISand How do I do that in Manifold SQL.  

From the back cover of How do I do that in PostGIS:

For those who are unsure if SQL is a sufficient language for performing GIS tasks, this book is for you. This guide follows the topic headings from the book How do I do that in ArcGIS/Manifold, as a way to illustrate the capabilities of the PostGIS SQL engine for accomplishing classic GIS tasks. With this book as a resource, users will be able to perform many classic GIS functions using nothing but SQL.

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