This travel bookshop in Amsterdam is fantastic. http://www.piedaterre.nl/
It has a specific section for touring by bike - with books, maps and camping info, not just for the Netherlands but everywhere on your route. It also has a cafe with large tables where you can take maps and books, and make plans over coffee and cake without actually having to buy the books.
On the same street (Overtoom) there are three decent bike shops and two good outdoor/camping shops.
This travel bookshop in Amsterdam is fantastic.
http://www.piedaterre.nl/
It has a specific section for touring by bike - with books, maps and camping info, not just for the Netherlands but everywhere on your route. It also has a cafe with large tables where you can take maps and books, and make plans over coffee and cake without actually having to buy the books.
On the same street (Overtoom) there are three decent bike shops and two good outdoor/camping shops.
Right vext to Overtoom is Vondelpark, which has a very good bike-friendly hostel right on the edge: http://www.stayokay.com/index.php?pageID=3207&hostelID=356022