MLRS Books is offering a discount on their books until the end of the month.
From their announcement:
We are cutting all prices by 25% on the first three books you order, and any above that number will be discounted at 30% – so books 1-3 are at 25% discount, books 4 and upwards get 30% off. This applies to each single order, and is not cumulative.
Postage charges will be as normal – cost plus packaging.