From Monachos.net
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On any Library Document page (or any text page in the Monachos.net Library), move your mouse over the white area in the second bar at the top right-hand of the page (beneath the text 'Orthodoxy through patristic, monastic and liturgical study' in the uppermost right-hand corner); you will notice a 'hidden' link when the cursor turns into a hand. Click the hidden link to be taken to the sign-in screen (or just follow the link here).
Note: On some older browsers, the hidden / invisible link is further toward the centre of the screen, rather than at the right. Scroll your mouse from right to left across the white bar at the top of the page (which gradually fades to blue as you move left), until the cursor changes, revealing the hidden link.