Our website now allows you to mix an order of ProGuides (Line Ops and USAR Ops) into one shopping cart.
Orders for non-physical items (downloads etc.) must be placed separately as they're processed a different way. We haven't combined TSH and ProGuide book orders into the same cart as they will always be sent in different boxes, and so there's no saving in P+P by combining the orders. Of course as there's no per-order surcharge either by us or by PayPal, you're not losing out by submitting two payments.